Home>News Center>World
         
 

Bird flu capable of human-to-human infection
(Agencies)
Updated: 2005-05-19 15:46

GENEVA - A World Health Organisation study in Vietnam has raised the possibility that bird flu is becoming more capable of human-to-human transmission, the WHO said.

The study of bird flu outbreaks in Vietnam until April 2005, presented to a meeting with Asian countries in Manila on May 6, suggested an evolution of infections by the H5N1 virus in Vietnam, according to a report on the meeting.

Bird flu capable of human-to-human infection
A bird flu patient lies under a respirator at Hanoi's Institute for Tropical Diseases. A World Health Organisation study in Vietnam has raised the possibility that bird flu is becoming more capable of human-to-human transmission, the WHO said. [AFP]
"The changes in the epidemiological patterns are consistent with the possibility that recently emerging H5N1 viruses may be more infectious for humans," it said.

While that meant a greater number of people might be infected by poultry, there was also evidence that human to human transmission, which has already been found several times since the strain was first detected in Hong Kong in 1997, was strengthening, the UN health agency said.

"It is possible that avian flu viruses are becoming more capable of human-to-human transmission," the report said.

"While the implications of these epidemiological and virological findings are not fully clear, they demonstrate that the viruses are continuing to evolve and pose a continuing and potentially growing pandemic threat," the report said.

Fears of that a new deadlier strain of flu might spread rapidly around the world on a similar scale to pandemics in the last century have been revived with the emergence of the H5N1 bird flu virus among humans in Asia.

Fifty-two people have died in Vietnam, Thailand and Cambodia since late 2003, mainly through infection from poultry.

Concern is now heightened because a pandemic strain may develop through a series of small steps that taken individually might not be enough to signal clearly that an epidemic was about to start, according to the UN health agency.

"It is not sudden event but a complex sequence of events that lead to a pandemic," said WHO official Richard Nesbit.

The pattern of changes observed in north Vietnam included more and larger human clusters of the disease, the increasing mean age of the victims and the lower fatality rate.

Analysis of genes from both avian and human forms of H5N1 from several countries also suggested changes in the virus, the report said.

The report reiterated the health agency's call for "immediate steps" to boost monitoring for possible pandemic influenza in all countries affected by H5N1 in birds.

It also recommended that all countries, including those which were unaffected by the strain, should move ahead with operational plans to tackle a possible global spread of deadlier form of flu.

Other interpretations for the trends observed in Vietnam were raised, including transmission through contaminated water or food or infection from poultry that carried the virus but did not show symptoms, or greater persistence of the virus in the environment.

The experts meting in Manila also considered that the changes seen in north Vietnam could be "inconsequential" but dismissed that assessment as unlikely.

A second human case of bird flu was identified in under a week in Vietnam on Tuesday.

Thirty-six people have died from the disease in Vietnam since late 2003.



USS Park Royal crew await for Rice
Coffin of Milosevic flew to Belgrade
Kidnapping spree in Gaza Strip
 
  Today's Top News     Top World News
 

Australia, US, Japan praise China for Asia engagement

 

   
 

Banker: China doing its best on flexible yuan

 

   
 

Hopes high for oil pipeline deal

 

   
 

Possibilities of bird flu outbreaks reduced

 

   
 

Milosevic buried after emotional farewell

 

   
 

China considers trade contracts in India

 

   
  Journalist's alleged killers held in Iraq
   
  No poisons found in Milosevic's body
   
  US, Britain, France upbeat on Iran agreement
   
  Fatah officials call for Abbas to resign
   
  Sectarian violence increases in Iraq
   
  US support for troops in Iraq hits new low
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  Related Stories  
   
Health experts watching bird flu evolution
   
Asia's bird flu here to stay, FAO says
   
Asia facing real risk of bird flu pandemic - experts
   
Bird flu kills Vietnam girl, Asia toll now 50
   
Vietnam reports new bird flu infection
Manufacturers, Exporters, Wholesalers - Global trade starts here.
Advertisement
         
主站蜘蛛池模板: 亚洲一级免费毛片| 国产一级做a爰片...| jizz免费在线影视观看网站| 日产精品99久久久久久| 亚洲а∨精品天堂在线| 波多野结衣久久高清免费| 午夜理论影院第九电影院| 韩国v欧美v亚洲v日本v| 国产精品久久久久国产精品三级| 99久久无色码中文字幕人妻| 好男人社区www在线视频| 中文字幕一区在线观看| 日本在线色视频| 久热这里只有精品12| 欧美亚洲一区二区三区| 男女一级毛片免费视频看| 国产伦精品一区二区三区| 国产99在线|亚洲| 国产的一级毛片完整| 2022国产成人精品福利网站| 国内黄色一级片| WWW夜片内射视频在观看视频| 少妇高潮太爽了在线观看| 中文在线免费观看| 插鸡网站在线播放免费观看| 久久久久久久综合日本| 日本特黄特色aaa大片免费| 久久精品免费一区二区喷潮 | 国产精品无码专区av在线播放| 91精品在线看| 国内国外精品影片无人区| 99ri在线观看| 在电影院嗯啊挺进去了啊视频| 99精品视频免费观看| 夏夏和三个老头第二部| 99视频在线免费看| 大又大粗又爽又黄少妇毛片| av片在线观看永久免费| 夜夜橹橹网站夜夜橹橹| 99久久精品午夜一区二区| 在线va无码中文字幕|