Louisiana has reported the first U.S. fatality from avian influenza. Most of the country’s human cases have been mild ...

The virus in the first severe human bird flu case in the U.S. was found to have mutated. Newsweek's live blog is closed.

Bird flu, also called avian influenza ... 40% of people who are hospitalized with the virus. H9 strains. The H9N2 strain has mainly affected children and caused mild upper respiratory tract ...

Bird flu infections are rare in people ... 1999 – Two children in Hong Kong are infected by the H9N2 strain. February 2003 – Eighty-four people in the Netherlands are affected by the H7N7 ...