Mice with a handful of cancerous cells in their lungs experienced a 100-fold increase to this number after being infected ...

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

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

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.

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

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

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.

Swine flu vaccines are due to start arriving in the United States next week with high-risk patients first in line, according to Dr. Richard Besser, ABC News' senior health and medical editor.

He said protecting swine, cattle, and even poultry production is very important. And it could cut off flu strains from evolving and jumping from species to species.