Published in TB and Outbreaks Week, July 20th, 2004
The avian flu has forced authorities to slaughter millions of chickens and other fowl in Asia to stem outbreaks in recent years. Thousands more have been killed in the United States and elsewhere.
Already the flu has passed from birds to humans in Hong Kong, killing 6 of 18 people infected in 1997, and human cases have been reported since then in Vietnam and Thailand.
Now China-based researchers studying the H5N1 strain of the flu report that it has been changing over...
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