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

Preexisting immunity to the 2009 H1N1 influenza virus provided near-complete protection against severe H5N1 disease and ...

In experiments conducted in a biosafety level 3 facility, the researchers studied ferrets that had antibodies to seasonal flu ...

Scientists in Switzerland have cracked open a century-old viral mystery by decoding the genome of the 1918 influenza virus from a preserved Zurich patient. This ancient RNA revealed that the virus had ...