Health Supreme by Sepp Hasslberger

Networking For A Better Future - News and perspectives you may not find in the media

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October 28, 2005

Avian Flu - Is Specialization Killing Us?

Could specialization in medicine be keeping us from finding an effective way to prevent a potentially disastrous bird flu epidemic?

Specialization in medicine - as in other branches of science and art - is an asset, but it also has its drawbacks. Invariably, specialized knowledge tends to develop where the money is, where grants and facilities are available. We have a myriad of experts analyzing the latest virus in great detail, dissecting it, defining its genetic sequences and its potential dangers. That is where the money is: development and manufacture of vaccines and drugs to counter that one specific threat, that specific mutation of the virus.

With all this attention on the details, we seem to miss the bigger picture. Could there be other, much better means of preventing a pandemic than tailor-making a vaccine or drug? Perhaps yes, but we are not looking - because all the money is in vaccine research, drug development and genetics.

A real preventive strategy would look at three areas:

It would look at where the constant supply of ever new viral strains comes from. Consequently, it would strive to make the bird population less prone to developing viral outbreaks. Chicken farms come to mind with their crowded conditions that promote the spread of any virus. Hygiene, better conditions for the birds, better nutrition for the birds, whatever is needed.

It would seek to develop and deploy a non-specific, all-encompassing immune enhancing strategy in humans. Some herbal or nutrient combination - not a vaccination - that actually makes persons more resilient and healthy. Strategies abound. We just need to decide on the best one, find the right combination.

It would seek to apply known effective anti-viral agents in those humans who have contracted a potentially pandemic virus. Vitamin C in megadose therapy comes to mind. It has been shown effective and should be given routinely by medical doctors and in hospitals - certainly until we find something better.

Too many virologists and not enough thinkers

Virologists will do what they were trained to do. They will come up with a vaccine that takes months to produce and routinely is of more than dubious effect. This is becoming more and more apparent in the yearly race for a flu vaccine. Guesswork is rampant and as often as not, the vaccine is useless or worse.

Why is it we don't think in terms of a sweeping strategy that starts with the source of contamination and strengthens human immune capacity in a general way while using what has already been proven effective?

Because all the money is in pharmaceuticals. All the research is about pharmaceuticals. All government regulators hear is the advice of pharmaceutical advisers and advertisers.

We have lost common sense, it seems, and are all worshiping the virus-god. We have a love-hate relationship with it. We study it and analyze it. We develop poisons to destroy it. We wage war against it. The war is fought right inside our bodies. It's poison against virus and incidentally, our body becomes the battle field. I bet if we really looked we could see the wounded and the dead...

Yet we have bodies that are immensely capable of dealing with any bacteria and any virus. It's routine, day in, day out. It has been going on for as long as human bodies exist. If we only supported our bodies in their vitality and in their capability of taking care of intruders, we would be fine.

The proponents of pharmaceutical intervention will say "bollocks you need to fight the virus". Make war on the virus, much like make war on drugs and make war on terrorism - affront and destroy the invader. Only - it doesn't seem to work. By directly opposing a generic threat, we end up perpetuating the problem instead of solving it. The next pandemic is as certain as the next sunday ball game, according to the experts.

My challenge is: Where is your comprehensive strategy? Are we not focused too narrowly on the virus of the moment while we forget to look at the larger picture?

Here are two recent articles to illustrate my point.

One is short and full of hope, and it goes a long way of starting us out on the way to a more sane strategy to get a grip on the problem. An Indonesian researcher has actually found a concoction - strange as it may seem - that has shown a promising effect. It apparently prevented "infected" chicks from getting sick. This was first published on Xinhuanet and later re-posted on the Curezone Forum.

The second article is a special report, recently published in the Scientific American. It is an illustration of what we are doing, how we are getting into the most minute detail, figuring out the moves of the "enemy", the virus and planning our counter-moves. The article does make fascinating reading but it also shows how we are eternally behind in finding a vaccine, and how we never seem to arrive at a real solution. Why?

Read and make up your own mind.

Even the comics are starting to weigh in on the discussion. And at times the comics - court jesters in the old times - are the only ones who dare say what the emperor does not want to hear. Here are links for you to enjoy Jon Stewart's scathingly brilliant Daily Show piece on the bird flu.

Quicktime Movie Link (106 MB)
MP3 Audio Link (6.7 MB)

So here is my question - why not look at the bigger picture? Pharma's profits are not ALL there is in this world!

Let me also give credit where credit is due. Here is an email from a friend in the UK, which did play a role in making me write this article. Otto says:

"There is a lot of talk on the subject of "Bird Flu", most of it hyped-up media reports, scare mongering and the Pharmas being fed hundreds of millions in consequence, for drugs which have no track record of successfully combating this human variant of that bug, the Pharmas don't even know yet which type it is and how to provide a cure. They must be laughing all the way to the bank !

But nobody is asking the question why this bug is not prevented from infecting birds in the first place and where and how it originates.

It's like the old Malaria. It's more effective eliminating the breeding grounds of mosquitoes spreading it rather than providing a cure for it, which needs constant adjustments to cope with new strains of it."

- - -

See also:

How to Stop Bird Flu - Instead of the Vaccine-Antiviral Model
We've had twenty years of the same vaccine-antiviral model for the current AIDS pandemic, with little sign of progress. The multibillion-dollar global initiative to combat AIDS has created expensive patented drugs with very toxic side effects that poor countries cannot afford anyways, and vaccines that are ineffective at best and at worst, unsafe. The policy is not working because the root causes of the pandemic, indeed any pandemic - poverty and malnutrition - have not been addressed. There have been serious abuses of this flawed approach that have come to light...

Clinical Guide to the Use of Vitamin C
The Clinical Experiences of Frederick R. Klenner, M.D., abbreviated, sumarized and annotated by Lendon H. Smith, M.D.

Treatment of the flu with massive doses of vitamin C

The Observer: Roche makes a killing
Sunday October 23, 2005 - As panic spreads over avian flu, the Swiss pharmaceutical giant is accused of putting profits before people. Nick Mathiason reports


This Latest Health Scare Could Wipe Out Millions… of Pounds

LA Times: An epidemic of overreaction
By Marc Siegel, MARC SIEGEL is an internist and associate professor at the New York University School of Medicine. He is the author of "False Alarm: The Truth about the Epidemic of Fear"

Bird Flu: Fearmongering For Total Control?

Snorting Avian Flu Vaccines - could this cause an Avian Flu Epidemic?
On September 28, 2005, a Reuters press release announced that MedImmune, a company that makes a nasal spray vaccine product called FluMist, had "signed up with the U.S. government on Wednesday to try to make a version of its jabless vaccine for avian flu." According to the press release, the development will entail "splicing" of "selected" avian influenza genes into a "weakened" live human flu virus. There are many things wrong with this idea...

Avian Flu Awareness
... a bird flu (avian influenza) information and action site.

Bird Flu or Cash Cow?
Just in from Eve Hillary in Australia: A new investigative article on the Bird Flu with facts not revealed before. Bird Flu or Cash Cow - The Pandemic Some Want to Have - WHO's behind designer germs?

Dr. Sherri Tenpenny, DO - December 7, 2005
A level-headed examination of 10 important facts shows that the prevailing alarmist point of view is inaccurate, irresponsible and self-serving.

Avian flu outbreaks may no longer be confined to bird populations. Looks like that the bird flu is about to get a helping hand in jumping the species barrier...
U.S. Team Will Test Live-Virus Bird Flu Vaccine
Researchers at the U.S. National Institutes of Health will soon recruit 30 human volunteers to test the effectiveness of a vaccine containing a live but weakened form of the H5N1 bird flu virus.

U.S. research justifies mass vaccination "before the virus hits"
This is an interesting audio interview. A computer-simulation based study raises the possibility of using a vaccine widely, even before a pandemic ... the distinction of cause and effect melts imperceptibly into the background.

- - -

And here are copies of the two articles cited:

Indonesian researcher finds herbal formula to curb bird flu

(original on xinhuanet)

2005-09-15 20:48:57

    JAKARTA, Sept. 15 (Xinhuanet) -- An Indonesian researcher has found a herbal formula to ward off bird flu virus on chicken, saying that there is a possibility of using the formula on other animals and humans.

    Sumardi, 42, a researcher at the Food Technology School of Semarang's Soegipapranata Catholic University, accidentally found the formula in July.

    In a telephone interview with Xinhua from the capital of Central Java Province of Semarang on Thursday, Sumardi said, the formula basically comprised four traditional medicinal plants: Java chili powder (piper retrofactum), white turmeric extract (curcuma xanthorriza), temu ireng extract (curcuma aeruginosa) and powder of fragrant wild ginger (zingiber aromaticum).

    Sumardi mixed these four materials with bee honey, cane sugar, and some water.

    Among the four basic materials, zingiber aromaticum had the strongest effect in blocking the attack of the lethal virus, he said.

    "The zingiber aromaticum has ions of OH minus and OH plus that can easily react. It is strongly predicted that the ions curb the growth of H5N1 virus," he added.

    The researcher cited that in normal conditions, one virus of H5N1 could develop into four within two seconds.

    "So the scores of the bird flu virus in chickens being attacked will not increase, and the number of virus can be declined as the virus has a life cycle," he said, "So the chickens can survive, despite the fact that they grow slower."

    These chickens are safe to be consumed as long as they are cooked with at least 80 degree Celsius, he said.

    Sumardi said, in July he tried this formula with 400 chicks, which were places close to carcasses of chicken that had died of the H5N1 virus, somewhere in East Java province.

    He divided these chicks into four groups of 100 each. The first group was given no medicine at all. The second group was given a low dose of 10 percent, the third group of 20 percent and the fourth 30 percent.

    "On the fourth day, all the chicks treated with the formula with various doses had survived, but those without having the treatment all died," said Sumardi.

    But, he said that if the formula was given to the poultry in too high doses it could decline chickens' desire to eat.

    Asked whether the formula could be used for other animals such as goat, pig, and cow, he said, "I believe so, it needs an examination."

    He said that the culling method recommended in Indonesia was developed from the experience of developing countries, where poultry raising is very concentrated in almost factory-type situations. But in Indonesia there are millions of chickens that live in backyards.

(text slightly edited for better understandability - original on xinhuanet)

- - - -

November 2005 issue

SPECIAL REPORT - see original here

Preparing for a Pandemic

One day a highly contagious and lethal strain of influenza will sweep across all humanity, claiming millions of lives. It may arrive in months or not for years--but the next pandemic is inevitable. Are we ready?

By W. Wayt Gibbs and Christine Soares

When the levees collapsed in New Orleans, the faith of Americans in their government's ability to protect them against natural disasters crumbled as well. Michael Chertoff, the secretary of homeland security who led the federal response, called Hurricane Katrina and the flood it spawned an "ultracatastrophe" that "exceeded the foresight of the planners."

But in truth the failure was not a lack of foresight. Federal, state and local authorities had a plan for how governments would respond if a hurricane were to hit New Orleans with 120-mile-per-hour winds, raise a storm surge that overwhelmed levees and water pumps, and strand thousands inside the flooded city. Last year they even practiced it. Yet when Katrina struck, the execution of that plan was abysmal.

The lethargic, poorly coordinated and undersized response raises concerns about how nations would cope with a much larger and more lethal kind of natural disaster that scientists warn will occur, possibly soon: a pandemic of influenza. The threat of a flu pandemic is more ominous, and its parallels to Katrina more apt, than it might first seem. The routine seasonal upsurges of flu and of hurricanes engender a familiarity that easily leads to complacency and inadequate preparations for the "big one" that experts admonish is sure to come.

The most fundamental thing to understand about serious pandemic influenza is that, except at a molecular level, the disease bears little resemblance to the flu that we all get at some time. An influenza pandemic, by definition, occurs only when the influenza virus mutates into something dangerously unfamiliar to our immune systems and yet is able to jump from person to person through a sneeze, cough or touch.

Flu pandemics emerge unpredictably every generation or so, with the last three striking in 1918, 1957 and 1968. They get their start when one of the many influenza strains that constantly circulate in wild and domestic birds evolves into a form that infects us as well. That virus then adapts further or exchanges genes with a flu strain native to humans to produce a novel germ that is highly contagious among people.

Some pandemics are mild. But some are fierce. If the virus replicates much faster than the immune system learns to defend against it, it will cause severe and sometimes fatal illness, resulting in a pestilence that could easily claim more lives in a single year than AIDS has in 25. Epidemiologists have warned that the next pandemic could sicken one in every three people on the planet, hospitalize many of those and kill tens to hundreds of millions. The disease would spare no nation, race or income group. There would be no certain way to avoid infection.

Scientists cannot predict which influenza strain will cause a pandemic or when the next one will break out. They can warn only that another is bound to come and that the conditions now seem ripe, with a fierce strain of avian flu killing people in Asia and infecting birds in a rapid westward lunge toward Europe. That strain, influenza A (H5N1) does not yet pass readily from one person to another. But the virus is evolving, and some of the affected avian species have now begun their winter migrations.

As a sense of urgency grows, governments and health experts are working to bolster four substantial lines of defense against a pandemic: surveillance, vaccines, containment measures and medical treatments. The U.S. plans to release by October a pandemic preparedness plan that surveys the strength of each of these barricades. Some failures are inevitable, but the more robust those preparations are, the less humanity will suffer. The experience of Katrina forces a question: Will authorities be able to keep to their plans even when a large fraction of their own workforce is downed by the flu?

Surveillance: What Is Influenza Up to Now?

Our first defense against a new flu is the ability to see it coming. Three international agencies are coordinating the global effort to track H5N1 and other strains of influenza. The World Health Organization (WHO), with 110 influenza centers in 83 countries, monitors human cases. The World Organization for Animal Health (OIE, formerly the Office International des …pizooties) and the Food and Agriculture Organization (FAO) collect reports on outbreaks in birds and other animals. But even the managers of these surveillance nets acknowledge that they are still too porous and too slow.

Speed is of the essence when dealing with a fast-acting airborne virus such as influenza. Authorities probably have no realistic chance of halting a nascent pandemic unless they can contain it within 30 days. The clock begins ticking the moment that the first victim of a pandemic-capable strain becomes contagious.

The only way to catch that emergence in time is to monitor constantly the spread of each outbreak and the evolution of the virus's abilities. The WHO assesses both those factors to determine where the world is in the pandemic cycle, which a new guide issued in April divides into six phases.

The self-limiting outbreaks of human H5N1 influenza seen so far bumped the alert level up to phase three, two steps removed from outright pandemic (phase six). Virologists try to obtain samples from every new H5N1 patient to scout for signs that the avian virus is adapting to infect humans more efficiently. It evolves in two ways: gradually through random mutation, and more rapidly as different strains of influenza swap genes inside a single animal or person.

The U.S. has a sophisticated flu surveillance system that funnels information on hospital visits for influenzalike illness, deaths from respiratory illness and influenza strains seen in public health laboratories to the Centers for Disease Control and Prevention in Atlanta. "But the system is not fast enough to take the isolation or quarantine action needed to manage avian flu," said Julie L. Gerberding, the CDC director, at a February conference. "So we have been broadening our networks of clinicians and veterinarians."

In several dozen cases where travelers to the U.S. from H5N1-affected Asian countries developed severe flulike symptoms, samples were rushed to the CDC, says Alexander Klimov of the CDC's influenza branch. "Within 40 hours of hospitalization we can say whether the patient has H5N1. Within another six hours we can analyze the genetic sequence of the hemagglutinin gene" to estimate the infectiousness of the strain. (The virus uses hemagglutinin to pry its way into cells.) A two-day test then reveals resistance to antiviral drugs, he says.

The next pandemic could break out anywhere, including in the U.S. But experts think it is most likely to appear first in Asia, as do most influenza strains that cause routine annual epidemics. Aquatic birds such as ducks and geese are the natural hosts for influenza, and in Asia many villagers reside cheek by bill with such animals. Surveillance in the region is still spotty, however, despite a slow trickle of assistance from the WHO, the CDC and other organizations.

A recent H5N1 outbreak in Indonesia illustrates both the problems and the progress. In a relatively wealthy suburb of Jakarta, the eight-year-old daughter of a government auditor fell ill in late June. A doctor gave her antibiotics, but her fever worsened, and she was hospitalized on June 28. A week later her father and one-year-old sister were also admitted to the hospital with fever and cough. The infant died on July 9, the father on July 12.

The next day an astute doctor alerted health authorities and sent blood and tissue samples to a U.S. Navy medical research unit in Jakarta. On July 14 the girl died; an internal report shows that on this same day Indonesian technicians in the naval laboratory determined that two of the three family members had H5N1 influenza. The government did not acknowledge this fact until July 22, however, after a WHO lab in Hong Kong definitively isolated the virus.

The health department then readied hospital wards for more flu patients, and I Nyoman Kandun, head of disease control for Indonesia, asked WHO staff to help investigate the outbreak. Had this been the onset of a pandemic, the 30-day containment window would by that time have closed. Kandun called off the investigation two weeks later. "We could not find a clue as to where these people got the infection," he says.

Local custom prohibited autopsies on the three victims. Klaus Stˆhr of the WHO Global Influenza Program has complained that the near absence of autopsies on human H5N1 cases leaves many questions unanswered. Which organs does H5N1 infect? Which does it damage most? How strongly does the immune system respond?

Virologists worry as well that they have too little information about the role of migratory birds in transmitting the disease across borders. In July domestic fowl infected with H5N1 began turning up in Siberia, then Kazakhstan, then Russia. How the birds caught the disease remains a mystery.

Frustrated with the many unanswered questions, Stˆhr and other flu scientists have urged the creation of a global task force to supervise pandemic preparations. The OIE in August appealed for more money to support surveillance programs it is setting up with the FAO and the WHO.

"We clearly need to improve our ability to detect the virus," says Bruce G. Gellin, who coordinates U.S. pandemic planning as head of the National Vaccine Program Office at the U.S. Department of Health and Human Services (HHS). "We need to invest in these countries to help them, because doing so helps everybody."

Vaccines: Who Will Get Them - and How Quickly?

Pandemics of smallpox and polio once ravaged humanity, but widespread immunization drove those diseases to the brink of extinction. Unfortunately, that strategy will not work against influenza--at least not without a major advance in vaccine technology.

Indeed, if an influenza pandemic arrives soon, vaccines against the emergent strain will be agonizingly slow to arrive and frustratingly short in supply. Biology, economics and complacency all contribute to the problem.

Many influenza strains circulate at once, and each is constantly evolving. "The better the match between the vaccine and the disease virus, the better the immune system can defend against the virus," Gellin explains. So every year manufacturers fashion a new vaccine against the three most threatening strains. Biologists first isolate the virus and then modify it using a process called reverse genetics to make a seed virus. In vaccine factories, robots inject the seed virus into fertilized eggs laid by hens bred under hygienic conditions. The pathogen replicates wildly inside the eggs.

Vaccine for flu shots is made by chemically dissecting the virus and extracting the key proteins, called antigens, that stimulate the human immune system to make the appropriate antibodies. A different kind of vaccine, one inhaled rather than injected, incorporates live virus that has been damaged enough that it can infect but not sicken. The process requires six months to transform viral isolates into initial vials of vaccine.

Because people will have had no prior exposure to a pandemic strain of influenza, everyone will need two doses: a primer and then a booster about four weeks later. So even those first in line for vaccines are unlikely to develop immunity until at least seven or eight months following the start of a pandemic.

And there will undoubtedly be a line. Total worldwide production of flu vaccine amounts to roughly 300 million doses a year. Most of that is made in Europe; only two plants operate in the U.S. Last winter, when contamination shut down a Chiron facility in Britain, Sanofi Pasteur and MedImmune pulled out all stops on their American lines--and produced 61 million doses. The CDC recommends annual flu immunization for high-risk groups that in the U.S. include some 185 million people.

Sanofi now runs its plant at full bore 365 days a year. In July it broke ground for a new facility in Pennsylvania that will double its output--in 2009. Even in the face of an emergency, "it would be very hard to compress that timeline," says James T. Matthews, who sits on Sanofi's pandemic-planning working group. He says it would not be feasible to convert factories for other kinds of vaccines over to make flu shots.

Pascale Wortley of the CDC's National Immunization Program raises another concern. Pandemics typically overlap with the normal flu season, she notes, and flu vaccine plants can make only one strain at a time. Sanofi spokesman Len Lavenda agrees that "we could face a Sophie's choice: whether to stop producing the annual vaccine in order to start producing the pandemic vaccine."

MedImmune aims to scale up production of its inhalable vaccine from about two million doses a year to 40 million doses by 2007. But Gellin cautions that it might be too risky to distribute live vaccine derived from a pandemic strain. There is a small chance, he says, that the virus in the vaccine could exchange genes with a "normal" flu virus in a person and generate an even more dangerous strain of influenza.

Because delays and shortages in producing vaccine against a pandemic are unavoidable, one of the most important functions of national pandemic plans is to push political leaders to decide in advance which groups will be the first to receive vaccine and how the government will enforce its rationing. The U.S. national vaccine advisory committee recommended in July that the first shots to roll off the lines should go to key government leaders, medical caregivers, workers in flu vaccine and drug factories, pregnant women, and those infants, elderly and ill people who are already in the high-priority group for annual flu shots. That top tier includes about 46 million Americans.

Among CDC planners, Wortley says, "there is a strong feeling that we ought to say beforehand that the government will purchase some amount of vaccine to guarantee equitable distribution." Australia, Britain, France and other European governments are working out advance contracts with vaccine producers to do just that. The U.S., so far, has not.

In principle, governments could work around these supply difficulties by stockpiling vaccine. They would have to continually update their stocks as new strains of influenza threatened to go global; even doing so, the reserves would probably always be a step or two behind the disease. Nevertheless, Wortley says, "it makes sense to have H5N1 vaccine on hand, because even if it is not an exact match, it probably would afford some amount of protection" if the H5N1 strain evolved to cause a pandemic.

To that end, the U.S. National Institute of Allergy and Infectious Diseases (NIAID) last year distributed an H5N1 seed virus created from a victim in Vietnam by scientists at St. Jude Children's Research Hospital in Memphis. The HHS then placed an order with Sanofi for two million doses of vaccine against that strain. Human trials began in March, and "the preliminary results from the clinical trial indicate that the vaccine would be protective," says NIAID director Anthony S. Fauci. "HHS Secretary Michael Leavitt is trying to negotiate to get up to 20 million doses," he adds. (Leavitt announced in September that HHS had increased its H5N1 vaccine order by $100 million.) According to Gel-lin, current vaccine producers could contribute at most 15 million to 20 million doses a year to the U.S. stockpile.

Those numbers are probably over-optimistic, however. The trial tested four different concentrations of antigen. A typical annual flu shot has 45 micrograms of protein and covers three strains of influenza. Officials had expected that 30 micrograms of H5N1 antigen--two shots, with 15 micrograms in each--would be enough to induce immunity. But the preliminary trial results suggest that 180 micrograms of antigen are needed to immunize one person.

An order for 20 million conventional doses may thus actually yield only enough H5N1 vaccine for about 3.3 million people. The true number could be even lower, because H5 strains grow poorly in eggs, so each batch yields less of the active antigen than usual. This grim picture may brighten, however, when NIAID analyzes the final results from the trial. It may also be possible to extend vaccine supplies with the use of adjuvants (substances added to vaccines to increase the immune response they induce) or new immunization approaches, such as injecting the vaccine into the skin rather than into muscle.

Caching large amounts of prepandemic vaccine, though not impossible, is clearly a challenge. Vaccines expire after a few years. At current production rates, a stockpile would never grow to the 228 million doses needed to cover the three highest priority groups, let alone to the roughly 600 million doses that would be needed to vaccinate everyone in the U.S. Other nations face similar limitations.

The primary reason that capacity is so tight, Matthews explains, is that vaccine makers aim only to meet the demand for annual immunizations when making business decisions. "We really don't see the pandemic itself as a market opportunity," he says.

To raise manufacturers' interest, "we need to offer a number of incentives, ranging from liability insurance to better profit margins to guaranteed purchases," Fauci acknowledges. Long-term solutions, Gellin predicts, may come from new technologies that allow vaccines to be made more efficiently, to be scaled up more rapidly, to be effective at much lower doses and perhaps to work equally well on all strains of influenza.

Rapid Response: Could a Pandemic Be Stopped?

As recently as 1999, WHO had a simple definition for when a flu pandemic began: with confirmation that a new virus was spreading between people in at least one country. Thereafter, stopping the flu's lightning-fast expansion was unthinkable--or so it then seemed. But because of recent advances in the state of disease surveillance and antiviral drugs, the latest version of WHO's guidelines recognizes a period on the cusp of the pandemic when a flu virus ready to burst on the world might instead be intercepted and restrained, if not stamped out.

Computer models and common sense indicate that a containment effort would have to be exceptionally swift and efficient. Flu moves with extraordinary speed because it has such a short incubation period--just two days after infection by the virus, a person may start showing symptoms and shedding virus particles that can infect others. Some people may become infectious a day before their symptoms appear. In contrast, people infected by the SARS coronavirus that emerged from China in 2003 took as long as 10 days to become infectious, giving health workers ample time to trace and isolate their contacts before they, too, could spread the disease.

Contact tracing and isolation alone could never contain flu, public health experts say. But computer-simulation results published in August showed when up to 30 million doses of antiviral drugs and a low-efficacy vaccine were added to the interventions a chance emerged to thwart a potential pandemic.

Conditions would have to be nearly ideal. Modeling a population of 85 million based on the demographics and geography of Thailand, Neil M. Ferguson of Imperial College London found that health workers would have at most 30 days from the start of person-to-person viral transmission to deploy antivirals as both treatment and preventives wherever outbreaks were detected.

But even after seeing the model results earlier this year, WHO officials expressed doubt that surveillance in parts of Asia is reliable enough to catch a budding epidemic in time. In practice, confirmation of some human H5N1 cases has taken more than 20 days, WHO flu chief Stˆhr warned a gathering of experts in Washington, D.C., this past April. That leaves just a narrow window in which to deliver the drugs to remote areas and dispense them to as many as one million people.

Partial immunity in the population could buy more time, however, according to Ira M. Longini, Jr., of Emory University. He, too, modeled intervention with antivirals in a smaller community based on Thai demographic data, with outcomes similar to Ferguson's. But Longini added scenarios in which people had been vaccinated in advance. He assumed that an existing vaccine, such as the H5N1 prototype version some countries have already developed, would not perfectly match a new variant of the virus, so his model's vaccinees were only 30 percent less likely to be infected. Still, their reduced susceptibility made containing even a highly infectious flu strain possible in simulations. NIAID director Fauci has said that the U.S. and other nations with H5N1 vaccine are still considering whether to direct it toward prevention in the region where a human-adapted version of that virus is most likely to emerge--even if that means less would remain for their own citizens. "If we're smart, we would," Longini says.

Based on patterns of past pandemics, experts expect that once a new strain breaks loose, it will circle the globe in two or three waves, each potentially lasting several months but peaking in individual communities about five weeks after its arrival. The waves could be separated by as long as a season: if the first hit in springtime, the second might not begin until late summer or early fall. Because meaningful amounts of vaccine tailored to the pandemic strain will not emerge from factories for some six months, government planners are especially concerned with bracing for the first wave.

Once a pandemic goes global, responses will vary locally as individual countries with differing resources make choices based on political priorities as much as on science. Prophylactic use of antivirals is an option for a handful of countries able to afford drug stockpiles, though not a very practical one. No nation has enough of the drugs at present to protect a significant fraction of its population for months. Moreover, such prolonged use has never been tested and could cause unforeseen problems. For these reasons, the U.K. declared this past July that it would use its pandemic stockpile primarily for treating patients rather than for protecting the uninfected. The U.S., Canada and several other countries are still working out their priorities for who will receive antivirals and when.

For most countries there will be no choice: what the WHO calls nonpharmaceutical interventions will have to be their primary defense. Although the effectiveness of such measures has not been extensively researched, the WHO gathered flu specialists in Geneva in March 2004 to try to determine which actions medical evidence does support. Screening incoming travelers for flu symptoms, for instance, "lacks proven health benefit," the group concluded, although they acknowledged that countries might do it anyway to promote public confidence. Similarly, they were skeptical that public fever screening, fever hotlines or fever clinics would do much to slow the spread of the disease.

The experts recommended surgical masks for flu patients and health workers exposed to those patients. For the healthy, hand washing offers more protection than wearing masks in public, because people can be exposed to the virus at home, at work and by touching contaminated surfaces--including the surface of a mask.

Traditional "social distancing" measures, such as banning public gatherings or shutting down mass transit, will have to be guided by what epidemiologists find once the pandemic is under way. If children are especially susceptible to the virus, for example--as was the case in 1957 and 1968--or if they are found to be an important source of community spread, then governments may consider closing schools.

Treatment: What Can Be Done for the Sick?

If two billion become sick, will 10 million die? Or 100 million? Public health specialists around the world are struggling to quantify the human toll of a future flu pandemic. Casualty estimates vary so widely because until it strikes, no one can be certain whether the next pandemic strain will be mild, like the 1968 virus that some flu researchers call a "wimp"; moderately severe, like the 1957 pandemic strain; or a stone-cold killer, like the "Great Influenza" of 1918.

For now, planners are going by rules of thumb: because no one would have immunity to a new strain, they expect 50 percent of the population to be infected by the virus. Depending on its virulence, between one third and two thirds of those people will become sick, yielding a clinical attack rate of 15 to 35 percent of the whole population. Many governments are therefore trying to prepare for a middle-ground estimate that 25 percent of their entire nation will fall ill.

No government is ready now. In the U.S., where states have primary responsibility for their residents' health, the Trust for America's Health (TFAH) estimates that a "severe" pandemic virus sickening 25 percent of the population could translate into 4.7 million Americans needing hospitalization. The TFAH notes that the country currently has fewer than one million staffed hospital beds.

For frontline health workers, a pandemic's severity will boil down to the sheer number of patients and the types of illness they are suffering. These, in turn, could depend on both inherent properties of the virus and susceptibility of various subpopulations to it, according to Maryland's pandemic planner, Jean Taylor. A so-called mild pandemic, for example, might resemble seasonal flu but with far larger numbers infected.

Ordinarily, those hardest hit by annual flu are people who have complications of chronic diseases, as well as the very young, the very old and others with weak immune systems. The greatest cause of seasonal flu-related deaths is pneumonia brought on by bacteria that invade after flu has depleted the body's defenses, not by the flu virus itself. Modeling a pandemic with similar qualities, Dutch national health agency researchers found that hospitalizations might be reduced by 31 percent merely by vaccinating the usual risk groups against bacterial pneumonia in advance.

In contrast, the 1918 pandemic strain was most lethal to otherwise healthy young adults in their 20s and 30s, in part because their immune systems were so hardy. Researchers studying that virus have discovered that it suppresses early immune responses, such as the body's release of interferon, which normally primes cells to resist attack. At the same time, the virus provokes an extreme immune overreaction known as a cytokine storm, in which signaling molecules called cytokines summon a ferocious assault on the lungs by immune cells.

Doctors facing the same phenomenon in SARS patients tried to quell the storm by administering interferon and cytokine-suppressing corticosteroids. If the devastating cascade could not be stopped in time, one Hong Kong physician reported, the patients' lungs became increasingly inflamed and so choked with dead tissue that pressurized ventilation was needed to get enough oxygen to the bloodstream.

Nothing about the H5N1 virus in its current form offers reason to hope that it would produce a wimpy pandemic, according to Frederick G. Hayden, a University of Virginia virologist who is advising WHO on treating avian flu victims. "Unless this virus changes dramatically in pathogenicity," he asserts, "we will be confronted with a very lethal strain." Many H5N1 casualties have suffered acute pneumonia deep in the lower lungs caused by the virus itself, Hayden says, and in some cases blood tests indicated unusual cytokine activity. But the virus is not always consistent. In some patients, it also seems to multiply in the gut, producing severe diarrhea. And it is believed to have infected the brains of two Vietnamese children who died of encephalitis without any respiratory symptoms.

Antiviral drugs that fight the virus directly are the optimal treatment, but many H5N1 patients have arrived on doctors' doorsteps too late for the drugs to do much good. The version of the strain that has infected most human victims is also resistant to an older class of antivirals called amantadines, possibly as a result of those drugs having been given to poultry in parts of Asia. Laboratory experiments indicate that H5N1 is still susceptible to a newer class of antivirals called neuraminidase inhibitors (NI) that includes two products, oseltamivir and zanamivir, currently on the market under the brand names Tamiflu and Relenza. The former comes in pill form; the latter is a powder delivered by inhaler. To be effective against seasonal flu strains, either drug must be taken within 48 hours of symptoms appearing.

The only formal test of the drugs against H5N1 infection, however, has been in mice. Robert G. Webster of St. Jude Children's Research Hospital reported in July that a mouse equivalent of the normal human dose of two Tamiflu pills a day eventually subdued the virus, but the mice required treatment for eight days rather than the usual five. The WHO is organizing studies of future H5N1 victims to determine the correct amount for people.

Even at the standard dosage, however, treating 25 percent of the U.S. population would require considerably more Tamiflu, or its equivalent, than the 22 million treatment courses the U.S. Department of Health and Human Services planned to stockpile as of September. An advisory committee has suggested a minimum U.S. stockpile of 40 million treatment courses (400 million pills). Ninety million courses would be enough for a third of the population, and 130 million would allow the drugs to also be used to protect health workers and other essential personnel, the committee concluded.

Hayden hopes that before a pandemic strikes, a third NI called peramivir may be approved for intravenous use in hospitalized flu patients. Long-acting NIs might one day be ideal for stockpiling because a single dose would suffice for treatment or offer a week's worth of prevention.

These additional drugs, like a variety of newer approaches to fighting flu, all have to pass clinical testing before they can be counted on in a pandemic. Researchers would also like to study other treatments that directly modulate immune system responses in flu patients. Health workers will need every weapon they can get if the enemy they face is as deadly as H5N1.

Fatality rates in diagnosed H5N1 victims are running about 50 percent. Even if that fell to 5 percent as the virus traded virulence for transmissibility among people, Hayden warns, "it would still represent a death rate double [that of] 1918, and that's despite modern technologies like antibiotics and ventilators." Expressing the worry of most flu experts at this pivotal moment for public health, he cautions that "we're well behind the curve in terms of having plans in place and having the interventions available."

Never before has the world been able to see a flu pandemic on the horizon or had so many possible tools to minimize its impact once it arrives. Some mysteries do remain as scientists watch the evolution of a potentially pandemic virus for the first time, but the past makes one thing certain: even if the dreaded H5N1 never morphs into a form that can spread easily between people, some other flu virus surely will. The stronger our defenses, the better we will weather the storm when it strikes. "We have only one enemy," CDC director Gerberding has said repeatedly, "and that is complacency.

- - - end of Scientific American article - - -

A friend in the US pointed out that the mechanism for death in the 1918 pandemic was a "a ferocious assault on the lungs by immune cells". Here is my reply and three comments from other friends, which I post as food for thought. As always, you must make up your own mind.

Comment by Alan:
According to the Scientific American article in your interesting message "Avian Flu -- Is Specialization Killing Us?", on the next to the last page, the mechanism of death in the 1918 pandemic was"a ferocious assault on the lungs by immune cells." For this reason, the people with the healthiest immune systems, the young healthy 20 and 30 year olds, had the highest mortality "because their immune systems were so hardy."

My reply, copied to some other people:
Dear Alan, an interesting point, thanks for bringing it up. I will have to let this slosh around a little to see whether or what to do about it. It certainly brings a strange twist to the possible epidemic we may be facing.

The passage Alan had made reference to:
In contrast, the 1918 pandemic strain was most lethal to otherwise healthy young adults in their 20s and 30s, in part because their immune systems were so hardy. Researchers studying that virus have discovered that it suppresses early immune responses, such as the body's release of interferon, which normally primes cells to resist attack. At the same time, the virus provokes an extreme immune overreaction known as a cytokine storm, in which signaling molecules called cytokines summon a ferocious assault on the lungs by immune cells. Doctors facing the same phenomenon in SARS patients tried to quell the storm by administering interferon and cytokine-suppressing corticosteroids. If the devastating cascade could not be stopped in time, one Hong Kong physician reported, the patients' lungs became increasingly inflamed and so choked with dead tissue that pressurized ventilation was needed to get enough oxygen to the bloodstream.

A comment from J. in the UK:
This is what I have mentioned from my earlier messages and why I am SO concerned about this virus - this is what is termed cytokine storm, so not only do we need people to have healthy immune systems but also well modulated ones: and this is where appropriate supplements can help - but modulation is not appropriate for everyone. It depends on how they present and react - it seems to be young and healthy adults who are most at risk of storm.

Aetiology is usually diarrhea and cramps followed by flu like symptoms. In some (the ones it most usually kills) the TGF cytokine response goes into overdrive resulting in destruction of the lungs, or, in some produces haemorhaggic symptoms and sytematic organ failure, in others produces symptoms of viral meningitis. All are accompanied by extremely high temperatures. Few are recovering from the storm when it occurs, and our best guess of a realistic death rate in Indonesia is a minimum of 100 at present before we even begin looking at the dengue misdiagnoses, JE misdiagnoses (half the deaths from both of these were negative at autopsy in indonesia) or consider the situation in Vietnam and Thailand etc etc.

Another comment by J. in the US:
i'd bet my bottom dollar that the idea of the 1918 flu virus suppressing early immune response in the form of interferon is total would researchers know this?....they have injected the 1918 flu virus into animals?...humans?.... and why did so many people NOT young and healthy die from the 1918 virus?....i'm sure they have another speculation for that.... as a favorite spy novelist of mine used to write: "bullshit of the purest ray serene"... without major evidence, i'm not even willing to concede they have found and isolated the 1918 flu virus at all.... nor am i willing to concede that the 1918 pandemic was from a flu eyewitness account speaks of the vaccines they gave the american troops as being part of the deal...and i have just found an article about the dumping of vast amounts of chenical weapons that started during ww1...some of these weapons, dumped into the ocean, have terrible effects on the lungs....i believe some of what they called theflu was from chemical weapons used in the war and dumped in the sea....

And another comment by (a different) J.:
It is not enhancing immunity that hastens death. The cytokine storm (autoimmunity) is the last-ditch effort by the immune system when it has failed to deal with the toxin in any other way. Ascorbate (vitamin C) exhaustion is one of the triggers of immune system failure.

See also:

BBC News Tuesday, 24 January 2006
Wild bird flu blame 'too hasty'
Governments across Europe are being too hasty in blaming the spread of avian flu on wild birds, says the Royal Society for the Protection of Birds.

Is bird flu a conspiracy?
Is there a link between Donald Rumsfeld and Gilead the company which invented Tamiflu and licensed it to Roche?

The Bird Flu Breakdown Part 1: Two Children in Vietnam
The much anticipated bird-flu plague has yet to emerge, despite much hue and cry. This comes as no surprise to those of us who are familiar with the machinations of the WHO (World Health Organization), CDC and NIH, and their pharmaceutical partners. But, for those more trusting of public health authorities who wish to know more about the making of public health policy, I thought I'd review some of the bright and shiny inconsistencies that have come into view on the bird flu.


posted by Sepp Hasslberger on Friday October 28 2005
updated on Monday December 6 2010

URL of this article:


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Readers' Comments

A comment received by email which I would like to share:

There is another important point here. By mass vaccinating the chicken populations in this case we are adding evolutionary pressure, forcing the virus to mutate to allow it to find a viable host, for it to survive - ie we are adding natural selection pressures all the time, accelerating the mutational process. It could well be this that is behind the mass of new deadly versions of old bugs, Coxsackie, Dengue, JE and HPAI - which seems to be producing epidemic outbreaks at unprecedented levels, if these instances
are not in fact masking Avian Influenza.

Overuse of mass vaccination of livestock may well be creating the problems we now seem to be facing, and apart from other issues we may need to be challenging if it is this that is leading to viri jumping species. Examples, Avian Flu (birds to humans/ mammals), Dogs are now succumbing to a lethal strain of virus that previously was only in horses, and heavily vaccinated against. You don't have to look too hard to find other examples.

Like all living entities, survival is key for a virus. Block off one avenue, and it will simply find another. Vaccines should therefore be an intervention of last resort when the threat is large, not standard annual practice. If we do not heed this warning that HPAI is giving us (just look at how this has emerged - overuse of vaccine in bird populations, forcing the virus to find another host), I believe we run serious risks that we will be facing bugs of equal potential for serious deaths and economic disruption on a biblical series of plaugue like bases. Ie a regular event.

Vaccines could in themselves be a fundamental cause of the problem.


Posted by: Sepp on October 28, 2005 03:38 PM


Of Tamiflu And Generic Things
Tamiflu is made of star anis, grown in China, and there seems to be a shortage looming, according to this article. The manufacturing process "takes a year" according to Roche. I wonder if there is a simpler way to use the herb...

Posted by: Sepp on October 29, 2005 10:06 PM


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