For Wild Animals, the Bird Flu Disaster Is Already Here The New York TimesCalifornia is at the epicenter of bird flu outbreak. How worried should you be? San Francisco ChronicleH5N1 bird flu is closer to gaining pandemic potential than we thought New ScientistBird Flu Virus Is One Mutation Away from Binding More Efficiently to Human Cells Scientific AmericanExperts Warn of Bird Flu Pandemic as Signals of Mutation Mount ScienceAlert