The Centers for Disease Control and Prevention (CDC) has identified mutations in the H5N1 bird flu virus that may increase ...

Two human cases of H5N1 avian flu have been confirmed in San Joaquin County, health officials reported Friday. The cases occurred in farmworkers with known exposure to infected animals, and both ...

Testing of samples taken from a child in California thought to have contracted H5N1 bird flu after ... was negative for all flu targets,” Kevin Griffis, director of the CDC’s office of ...

The CDC found no additional changes in the viral ... be necessary to ascertain whether the cause is seasonal flu or H5N1 bird flu. The child recovered. Public health experts have long warned ...

H5N1 avian influenza, commonly known as bird flu, is having an impact on the egg ... but negative when retested by the CDC. Seventeen of those cases are in Tulare County, an increase of two ...

State health officials emphasize that there is no evidence that human-to-human transmission of bird flu — avian influenza H5N1 — is happening ... were in Arizona. The CDC surveillance, which ...

To date, the CDC has confirmed 58 human cases ... There is no evidence yet that people can pass bird flu to each other, but scientists are concerned that H5N1 might evolve in that direction ...