Bird Flu Mutation: Risk of New Pandemic Explained
A new mutation and the first severe case of H5N1 bird flu discovered in a human in Louisiana has raised concern among some ...
Bird Flu Virus Mutation in First U.S. Severe Human Case May Increase Transmission in People
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.