H5N1 influenza is evolving rapidly, weakening the effectiveness of existing antibodies and increasing its potential threat to ...

The H5N1 avian influenza virus is mutating to evade immune defenses in mammals following prior infection or vaccination.

The detection of bird flu in a sheep is another sign that the H5N1 virus is adapting to hop to new hosts ...

Raw cheese made with milk from dairy cattle infected with bird flu can harbor infectious virus for months and may be a risk to public health, according to a new study from researchers at Cornell ...

But if the virus gains certain mutations, scientists fear it could trigger another pandemic. This prospect has propelled research into whether our defenses built up from past flu seasons can offer ...