Bird Flu Clusters May Signal Virus Change

THAILAND - A cluster of human bird flu cases among relatives and possibly health workers in Vietnam may show the virus is changing into a form that can be passed on by humans, the World Health Organization said. The WHO is worried that bird flu, which has killed 47 people in Asia, could mutate into an easily spread form that sparks the next influenza pandemic, killing millions.
calendar icon 14 March 2005
clock icon 2 minute read
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