三级aa视频在线观看-三级国产-三级国产精品一区二区-三级国产三级在线-三级国产在线

  Home>News Center>World
         
 

U.S. prepares to test bird flu vaccine
(Agencies)
Updated: 2005-02-24 14:28

Amid dire warnings of an Asian pandemic, the government is preparing to test an experimental bird flu vaccine and is increasing disease surveillance in hopes of reducing the toll from any eventual American outbreak.

Antiviral drugs are being stockpiled, and 2 million doses of vaccine are being stored in bulk form for possible emergency use and to test whether they maintain their potency.

United Nations officials warned on Wednesday that the Asian bird flu outbreak poses the "gravest possible danger" of becoming a global pandemic.

Dr. Julie Gerberding, director of the federal Centers for Disease Control and Prevention, told the National Press Club this week that "it is a worrisome situation," though she also said the United States "is not immediately on the brink of an avian flu epidemic."

The flu has affected poultry in eight Asian countries, with 45 human deaths among people who caught the illness, a strain of flu known as H5N1.

So far, humans appear to have caught this flu from chickens and other poultry, and the virus is not known to have spread from person to person.

The WHO's Regional Director for Asia-Pacific, Dr Shigeru Omi, said that bird flu would have a greater impact than the Severe Acute Respiratory Syndrome (SARS (news - web sites)) outbreak that killed nearly 800 people two years ago(AFP/File/Hoang Dinh Nam)
The WHO's Regional Director for Asia-Pacific, Dr Shigeru Omi, said that bird flu would have a greater impact than the Severe Acute Respiratory Syndrome (SARS) outbreak that killed nearly 800 people two years ago. [AFP/File]
What health authorities most fear is that the virus will mutate into a form that can pass easily from one human to another. That's when a global threat would be most likely.

The deadly flu of 1918, which killed from 20 million to 50 million people worldwide, didn't appear suddenly but mutated gradually into the deadlier form, Gerberding explained.

"That's why it's important to have flu vaccine and antivirals, to be ready to react when it starts to emerge," she said.

The first doses of an experimental vaccine are almost ready for testing, antiviral drugs are being stockpiled, and the government has increased disease surveillance and expanded research programs.

The new vaccine was prepared in two different concentrations — 4,000 doses each — and is nearly ready to be shipped to the National Institute for Allergy and Infectious Diseases for clinical trials, Len Lavenda, a spokesman for the pharmaceutical firm Sanofi Pasteur, said Wednesday.

NIAID Director Dr. Anthony Fauci said the vaccine will be tested at centers in Rochester, N.Y., St. Louis and in Maryland and Texas to make sure it is safe and to determine the correct dosage in such groups as the elderly, children and healthy young people.

In addition to the vaccine scheduled for trials, Sanofi Pasteur has produced 2 million doses of bulk avian flu vaccine, Lavenda said. The vaccine is being monitored for potency to determine if such vaccines can be produced in advance and stored until needed, he said.

Lavenda said any decision on using it if avian flu should spread would be up to the government.

Fauci said that vaccine could be available for emergency use if needed.

The 8,000 trial doses were not made under full commercial conditions, he said, so the company geared up at the same time to make 2 million doses under commercial production processes, "so that if the need arises they could rapidly scale up to tens of millions of doses."

In a normal year more than 100 million doses of influenza vaccine are prepared for use in the United States. The inability of one manufacturer to supply its planned 48 million doses caused a shortage this year, though about 58 million doses were produced.

Because the flu changes from year to year the vaccine has to be reformulated annually.

In Europe, a program called Flupan is under way with Sanofi, European Union agencies and the University of Reading in England working on a bird flu vaccine for clinical study.

CDC spokesman Tom Skinner said that agency has a stockpile of antiviral drugs that could be used in the event of a pandemic, depending on the virus that emerges.

The disease has appeared in poultry in Cambodia, China, Indonesia, Japan, Laos, South Korea, Thailand and Vietnam.

In an effort to catch any U.S. cases early, CDC has contacted state and local health departments, hospitals and doctors, urging them to ask about recent travel by people with flu symptoms.

It called for testing patients for the bird flu if they have been in an affected area within 10 days and have confirmed pneumonia or other severe respiratory problems.

In addition, CDC said, testing should be considered for patients with a temperature greater than 100.4 who have visited such countries, visited a poultry farm and have a cough, sore threat or shortness of breath.

Major flu pandemics over the last century, according to CDC, include:

_ Spanish flu that swept the world in 1918-1919 and killed an estimated 500,000 Americans. Nearly half were young, healthy adults.

_ Asian flu in 1957-1958 was first identified in China. It claimed 70,000 lives in the United States.

_ Hong Kong flu, 1968-1969 caused about 34,000 American deaths.



 
  Today's Top News     Top World News
 

Watchdogs go after malignant red dye

 

   
 

Vice-governor loses job for mine accident

 

   
 

Bidding starts on high-speed railway

 

   
 

Chirac calls on EU to lift arms embargo

 

   
 

Nation seeks energy efficient buildings

 

   
 

Clinton hails China AIDS progress, offers Help

 

   
  2 British soldiers guilty of Iraq abuse
   
  Allawi forming coalition to fight for PM
   
  Rescuers expect Iran death toll to rise
   
  Thousands protest Bush visit to Germany
   
  Khatami to Bush: Iran allows no meddling
   
  Chirac calls on EU to lift arms embargo
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  Related Stories  
   
Asia facing real risk of bird flu pandemic - experts
   
Asia's bird flu here to stay, FAO says
   
CDC chief: Bird flu could become epidemic
  News Talk  
  Are the Republicans exploiting the memory of 9/11?  
Advertisement
         
主站蜘蛛池模板: 国产欧美日韩一区二区三区视频 | 中文字幕不卡一区 二区三区 | 日韩日b视频 | 福利精品一区 | 久久不卡 | 一级白嫩美女毛片免费 | 色一区二区 | 久久色网 | 一级毛片a女人刺激视频免费 | 国产精品三 | 欧美黄网站 | 国产日产精品_国产精品毛片 | 欧美日韩国产亚洲综合不卡 | 91爱国产 | 国语一级毛片私人影院 | 国产麻豆精品 | 国产精品亚洲高清一区二区 | 国产成人爱片免费观看视频 | 免费网站在线高清观看 | 高清一级毛片免免费看 | 亚洲第一页在线 | 成人羞羞免费视频 | 成人在线网 | 亚洲精品香蕉一区二区在线观看 | 亚洲视频手机在线 | 国产乱在线观看视频 | a毛片免费视频 | 手机毛片在线 | 精品在线免费视频 | 精品一区精品二区 | 成人免费视频在线观看 | 国产在线精品一区二区中文 | 国产一区日韩二区欧美三区 | 窝窝午夜精品一区二区 | 在线观看日本免费视频大片 | 欧美变态一级毛片 | 91久久国产综合精品 | 五月天婷色 | 国产欧美亚洲精品第3页在线 | 一区二区三区四区无限乱码 | 亚洲一区二区三区免费视频 |