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The United States faces an extraordinary flu season as research uncovers unprecedented adaptations in the influenza A virus. This evolution has contributed to a significant surge in infections ...

The virus spread marks the first documented instance of the bird flu virus infecting domestic cats in the country. The development has raised significant concerns about interspecies transmission ...

Flu A can infect people and animals, while flu B is mostly a human virus. There are also 130 different subtype combinations of flu A, while flu B has just two lineages (B/Yamagata and B/Victoria ...

How does a virus become more infectious?In this case, flu A viruses have learned to mutate to stay alive longer, which in turn makes it more likely that you (and everyone around you) gets infected.

Flu A can infect people and animals, while flu B is mostly a human virus. There are also 130 different subtype combinations of flu A, while flu B has just two lineages (B/Yamagata and B/Victoria ...