U.S. study defines two clear bird flu strains (2 people dead 14 infected- Azerbaijan)
Alertnet ^ | 3-10-06
U.S. study defines two clear bird flu strains
ATLANTA, March 20 (Reuters) - The H5N1 strain of bird flu in humans has evolved into two separate strains, U.S. researchers reported on Monday, which could complicate developing a vaccine and preventing a pandemic.
http://www.freerepublic.com/focus/f-news/1599600/posts
Thanks for the flu links, Lucy.