quote[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.
One strain, or clade, made people sick in Vietnam, Cambodia and Thailand in 2003 and 2004 and a second, a cousin of the first, caused the disease in people in Indonesia in 2004.
Two clades may share the same ancestor but are distinct — as are different clades, or strains, of the AIDS virus, the team from the U.S. Centers for Disease Control and Prevention found.]
Is it on its' way?
Monday, March 20, 2006
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment