Antibodies to the highly pathogenic H5N1 avian influenza virus were found in the blood of three veterinarians out of 150 who work with cattle and agreed to have their blood tested, reports the CDC.

Prior exposures to specific types of seasonal influenza viruses promote cross-reactive immunity against the H5N1 avian ...

Previous exposures to older flu strains prime the immune system to produce antibodies against bird flu (H5N1).

Early flu exposure helps immunity against H5N1 infection, with older adults having stronger antibody responses.

Older adults who were exposed to seasonal flu viruses that circulated prior to 1968 are more likely to have some protection ...

New research suggests that past exposure to seasonal flu viruses may help protect people from severe illness caused by the ...

Officials are urging pet owners not to feed their pets raw food or raw milk and to avoid letting them roam outside.