New York Bird-flu crisis plan

Martin

Deceased
Bird-flu crisis plan

City sees lethal bug's arrival as inevitable







By PAUL H.B. SHIN
DAILY NEWS STAFF WRITER


Convinced it's only a matter of time before a new flu strain capable of killing millions reaches New York, city health officials have started drawing up a crisis plan, the Daily News has learned.
Infectious-disease experts at the Health Department have been meeting every two weeks to prepare a strategy for protecting the city against diseases such as the Asian bird flu, or H5N1, which many scientists believe is just one crucial mutation away from turning into a monster malady.

The written blueprint, which officials expect to complete before the next flu season starts in late fall, spells out how the agency will tackle potentially controversial measures.

The issues addressed include how to handle quarantines, test virus samples for new strains, cope with overcrowded hospitals and ration lifesaving vaccines and other treatments.

"It's very high on our priority list," said Dr. Isaac Weisfuse, the city's deputy commissioner of disease control who is spearheading New York's pandemic plan. "This is clearly an issue that we're concerned about."

Officials are honing the plan as more and more evidence suggests H5N1 is evolving rapidly since it reappeared in Asia with a vengeance in late 2003.

The World Health Organization unveiled an alarming report Wednesday indicating the virus is becoming more contagious - from birds to people and possibly even among people.

But critics say the city's plan may not go far enough, particularly if it counts on a share of the meager federal stockpile of Tamiflu, the antiviral drug that is the only known treatment against bird flu, also known as avian influenza.

"It's irresponsible that we are not stockpiling more of the antivirals," said Rep. Nita Lowey (D-N.Y.), a member of the congressional committee that overseas federal health agencies.

"We could really fail to adequately respond if there is a pandemic."

Federal authorities have purchased 2.3 million doses of Tamiflu - barely enough to treat 1% of Americans. Antivirals can reduce the severity of an illness and lower the infectiousness of people with the flu.

Britain, France and New Zealand have ordered enough Tamiflu to cover up to 20% of their populations, with Canada covering about 17%, according to Roche, the Swiss-based maker. Roche plans to open more plants in the United States by this fall and has fulfilled all orders, company spokesman Terence Hurley said.

Even before Britain placed its order, London officials independently bought about 100,000 doses of Tamiflu for its police, fire and transit workers after WHO issued a sobering warning about the growing threat of a pandemic.

New York officials said the city has not decided whether to stockpile Tamiflu, and cited major obstacles to stockpiling.

Because a pandemic can last up to two years, "we would have to buy a tremendous amount of Tamiflu because you would have to continually give it," Weisfuse said. "You're looking at a fairly major investment."

It costs about $2 million for 100,000 doses.

Also, there is no consensus among public health officials on how to use antivirals during a pandemic and who should get priority when supplies are limited, Weisfuse said.

But independent experts said city officials may be walking a fine line - trying not to upstage federal counterparts, whom they have to lean on in times of crisis.

Dr. Martin Blaser, president-elect of the Infectious Diseases Society of America, an association of physicians, agreed that details on how and when to use Tamiflu must be resolved.

"But the bottom line is that it is a good idea to stockpile it in some reasonable amount," he said. "Should New York City have its own supply? Probably so."

Lowey put it more bluntly:

"You can't play nice-nice when it comes to people's health and their lives. States and cities have to take the initiative to protect their own populations."

A pilot bird-flu vaccine is in clinical trials at the National Institutes of Health. But large-scale production of any new vaccine would take at least six months once an epidemic breaks out.


KILLER BIRD FLU


Q. What is bird flu, or avian influenza?

A. A type of flu that normally infects only birds. But sometimes the virus changes and jumps to other species, including pigs and humans. Scientists are calling this strain hitting Asia H5N1.

Q. Where and when was H5N1 first detected?

A. In Hong Kong in 1997. But it reappeared in Asia in late 2003.

Q. How many people have been infected with H5N1 since 2003?

A. At least 92, killing 36 Vietnamese, 12 Thais and four Cambodians.

Q. How many birds have died of H5N1 or have been culled?

A. More than 100 million.

Q. How many people have caught H5N1 from other people?

A. Scientists have been able to confirm only two cases — involving an 11-year-old Thai girl who infected her mother and aunt.

Q. Why are officials so worried about H5N1?

A. It is showing signs of mutating into a strain that could cause a worldwide epidemic, or pandemic, in people. It has also been found in pigs, which can carry both human and avian viruses. This means pigs can act as mixing vessels where the two types can swap genes and create virulent new strains.

Q. How many flu pandemics have there been in the past century?

A. Three. The 1918 Spanish flu killed 20 million to 50 million people. The 1957 Asian flu killed 1 million to 4 million. The 1968 Hong Kong flu killed about 1 million. All three pandemics were caused by viruses that originated in birds.

Originally published on May 22, 2005

http://www.nydailynews.com/front/story/311949p-266707c.html
 

Martin

Deceased
http://www.baltimoresun.com/news/op...y22,1,773897.story?coll=bal-opinion-headlines

Preparing for the worst




May 22, 2005

WHEN FLU vaccine was in short supply last year, U.S. authorities took pains to ensure that the drug was given to the people who needed it the most. Unfortunately, the world is not acting quite so judiciously when it comes to the far deadlier threat posed by avian influenza. While there is no vaccine yet developed that can protect humans against the H5N1 virus, there are two antiviral drugs that could help treat avian flu in its early stages and prevent its spread. The best-known of these is oseltamavir, or Tamiflu.
But here's the problem. Outbreaks of this deadly strain of flu have occurred primarily in eight Asian countries over the last two years. Where are the stockpiles of Tamiflu? Almost entirely in Western countries such as Great Britain, France and the United States. Some of these hot-spot Asian countries have only a few hundred doses, while the British are sitting on 14.6 million.

It's not hard to figure out why. The drug is expensive and countries such as Cambodia and Laos simply don't have the resources to create a stockpile. But if it's difficult now, what would happen if the threat of a global pandemic emerged?

Public health officials believe the world's best chance to head off a worldwide outbreak of avian flu would be to treat it aggressively at its source. Imagine a multinational medical team mobilized within days of a large-scale outbreak, flown into Asia, and providing technical assistance and millions of doses of antiviral drugs to the region. Scientists believe they might nip the disaster in the bud.

It's not uncommon for organizations such as the U.S. Centers for Disease Control and Prevention and its counterparts in Canada and Europe to assist foreign governments in times of public health crises. But no such civilian SWAT team or drug stockpile has been assembled to specifically combat avian flu. Admittedly, there are political obstacles to overcome, but the stakes are too high to be ignored. A flu pandemic could kill tens of millions. Preventing such an event is not an act of humanitarian aid; it should be regarded as a matter of national security.

The United States has time to prepare, but authorities need to act quickly. The H5N1 virus has been spread mostly by poultry-to-human contact. But in the most recent human infections, the death rate has been a staggering 70 percent. If the virus mutates to a form that could pass from one person to another, the outlook would be grave, indeed.



http://www.baltimoresun.com/news/op...coll=bal-opinion-headlines&ctrack=1&cset=true
 

north runner

Inactive
The idea of a swat team coming to my neighborhood to distribute drugs is pretty funny. I wonder if it will become a felony to refuse tamiflu when the birdflu finally gets here.

Don't you just love these health totalitarians.
 

nharrold

Deceased
"If the virus mutates to a form that could pass from one person to another, the outlook would be grave, indeed."

CS: might not such a mutation render the Tamiflu ineffective? That possibility might explain the difficulty in commiting to produce large amounts of the stuff NOW, when we don't know what the virus will look like if/when it eventually gets here. No?????
 
nharrold said:
"If the virus mutates to a form that could pass from one person to another, the outlook would be grave, indeed."

CS: might not such a mutation render the Tamiflu ineffective? That possibility might explain the difficulty in commiting to produce large amounts of the stuff NOW, when we don't know what the virus will look like if/when it eventually gets here. No?????


I believe that H5N1 is hard at work overcoming that difficulty (Tamiflu)

<B><font size=+1 color=red><center>Bird flu 'may pass to humans'</font>

Published: 17 May 2005
By: Julian Rush

Scientists are warning that the virus which causes bird flu could soon be able to pass between humans.</B></center>
New evidence seen by Channel 4 News points to an increased risk of a global flu outbreak because of the way the virus has started to mutate.

It has killed 52 people in Asia in the last two years, and despite the slaughter of millions of birds has not stopped spreading. Now we've seen a report by World Health Organisation scientists which warns that the risk of a global flu outbreak is increasing.

These are the first signs the bird flu virus H5N1 is evolving and evolving in ways that make a global pandemic more likely.

Deep in northern Vietnam, scientists have noticed localised changes in the patterns of infection.

In the lab, they have seen genetic changes too that suggest the virus in northern Vietnam is different: changes that may affect how the disease will spread.

Scientists at the World Health Organisation monitoring avian flu in South East Asia say they are seeing what they call a "worrisome development".

Recent cases have started appearing in clusters and the disease is getting a little milder - signs, they say, the virus may be adapting to humans: changing genetically to transmit more easily between people at the cost of losing a little of its virulence.

Professor Maria Zambon from the Health Protection Agency, told Channel 4 News: If you have a virus which is more virulent for humans it may be less transmissable. But if the virus is better able to transmit within humans it may be less virulent.

Even a weakened H5N1 virus will still be very dangerous. A flu virus infects human cells when a protein spike on the virus binds with a receptor on the cell surface.


The genetic changes they have seen in the northern Vietnam viruses are in the gene that codes for the spike, a molecule called haemaglutinin, in a part that controls how well the spike fits into the receptor.

The report we've seen recommends immediate steps should be taken to step up surveillance in countries where H5N1 is present and they say there's an urgent need for up-to-date information on the genetics of the virus.

Constant monitoring of virus from new victims is the key: the WHO denies reports south-east Asian countries have failed to provide samples - Vietnam alone has supplied over a hundred - but it does admit it's been hard to extract virus from many of them, hampering research.

H5N1 is proving to be a virus full of surprises. The original jump from wild ducks - where it doesn't cause illness - to domestic chickens where it kills - was a genetic leap akin to a jump from a cat to a horse. The leap from chickens to humans was even bigger.

The nastiest surprise would be what's called reassortment - if a completely new virus emerged after H5N1 got into someone already infected with conventional human flu.

So news today three pigs in Indonesia have tested positive for H5N1 is a warning. There aren't many pigs in this largely Muslim country, but as a precaution pigs are being quarantined and tested before they're slaughtered.

And the news there are signs of genetic shifts in the virus in northern Vietnam could affect the plans of some governments to control a pandemic with vaccines.

Many that are now being stockpiled are based on British research that took a virus from Vietnam last year and genetically engineered to make it safe. The man who did it admits genetic shifts since then could make the stockpiles redundant.

<b>One final surprise too. One recent sample from Vietnam proved to be, in part, resistant to the drug mainly used to treat victims of H5N1.

Chances are it's a one-off - the patient was being treated with the drug - but the WHO scientists warn that if further samples are found, it would have serious implications indeed.</b>
<A href="http://www.channel4.com/news/special-reports/special-reports-storypage.jsp?id=171">(LINK)</A>

(Some times I just *hate* my weird memory for things I have read)
 

Stargazer4

Contributing Member
China in national bid flu alert.

:shkr:

China has ordered nation wide emergency measures to try to stop the spread of bird flu after discovering that geese had been killed by the virus.

Tests confirmed that the geese found dead in qinghai province had been infected with H5N1 virus.

story BBc.

take care
 
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<B><font size=+1 color=brown><center>Tamiflu Resistant H5N1 in Vietnam?</font>

Recombinomics Commentary
May 17, 2005

>> The genetic changes they have seen in the northern Vietnam viruses are in the gene that codes for the spike, a molecule called haemaglutinin, in a part that controls how well the spike fits into the receptor…….</B></center>
One final surprise too. One recent sample from Vietnam proved to be, in part, resistant to the drug mainly used to treat victims of H5N1.

Chances are it's a one-off - the patient was being treated with the drug - but the WHO scientists warn that if further samples are found, it would have serious implications indeed. <<

The above comments on changes in HA suggest that the protein that is missing one amino acid is HA and the missing amino acid is in the poly-basic cleavage site. If so, it is likely that the missing amino acid matches the missing amino acid in H5N1 found in Shanghai and other provinces in eastern China. These data suggest that the new H5N1 in northern Vietnam is indeed a recombinant between the H5N1 in Vietnam and the H5N1 in China.

The data also suggest that H5N1 in China is also being under-reported, adding to the misinformation provided by the poor surveillance of H5N1. China, like all Asian countries that had H5N1 last year or this year has not submitted any publicly available 2005 H5N1 sequences to GenBank. The sequence held by WHO consultants but not shared by the rest of the scientific community may indeed provide clues that WHO appears to have trouble interpreting beyond a funny noise in a car.

Thus, media reports suggest that significant changes are occurring in HA and NA. NA is targeted by the only available H5N1 antiviral, Tamiflu, and the above report suggests that an H5N1 Tamiflu-resistant strain has evolved. Widespread use of Tamiflu will generate selection pressure for resistance, and the comments above imply that such resistance is relatively easy for H5N1 since the number of H5N1 confirmed patients treated with Tamiflu has been exceedingly low. Tamiflu is the antiviral drug being stockpiled by many countries.

However, because surveillance of H5N1 in mild cases in northern Vietnam has been virtually absent, the possibility of Tamiflu treatment of mild human cases is quite real, since the drug has been approved for treatment and prevention of influenza.
<A href="http://www.recombinomics.com/News/05170503/H5N1_Tamiflu_Resistance.html">(LINK)</A>
 
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