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.

“So the updated vaccine helps remind your body how to react when you face new versions of the virus.” Public health officials recommend everyone six months and older get an annual flu sho ...

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 ...