Studies suggest that people who had seasonal flus or vaccinations have low antibody levels against H5N1 bird flu.

Health officials in Kerala have confirmed that a student of class 9 in a school in Kollam has tested positive for H1N1 ...

Influenza viruses like bird flu can mix and match their genomes, and this has played a role in at least three of the last ...

H5N1 avian influenza has long been a concerning virus. Since its discovery in 1996 in waterfowl, bird flu has occasionally ...

The H5N1 avian flu is circulating in cows and other mammals. Whether it will make a permanent leap to humans is another ...

New versions of the H5N1 virus are increasingly adept at spreading. Suggestions to either let it rip in poultry or vaccinate the birds could backfire.

An epidemiologist makes the case that a rush of research to stop a swine flu outbreak led to an accidental lab release of an extinct virus. Preparing for one pandemic triggered a different one.

Bird flu isn’t as silent as we think — experts caution the pandemic threat is still growing It's been months since a major update in H5N1 news, but that doesn't mean the virus has disappeared ...

For more information about swine flu symptoms, treatment and prevention, check out the ABC News OnCall+ Swine Flu Center. "Kissing with masks isn't going to happen," said Horovitz.

The Askhams, U.K.'s first confirmed swine flu cases, have now made a complete recovery and have left Monklands hospital, where they were being treated.

Swine flu virus sweeps through Delhi-NCR: Survey shows 54% household has 1 patient suffering from swine flu symptoms, such as fever, sore throat, cough, headache, stomach issues, joint pain, and ...