Avian influenza H5N1 infection in humans has spread to seven U.S. states, growing from 46 cases last week to 52 cases this week.
Oregon confirms its first human bird flu case, the latest in dozens of cases in the U.S. this year. Experts discuss the ...
Reports this week of a teen in British Columbia who tested positive for H5 avian influenza has renewed attention on the virus ...
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