The flu virus is constantly evolving, meaning immunity from past infections or vaccinations may not fully protect against new strains. These mutations are why last year’s flu vaccine may no longer be ...

The flu tends to come on hard and fast, which can make it feel especially tough to go through, Dr. Schaffner says. “You can ...

It's officially fall, which means respiratory virus season is right around the corner, and it's now the best time to get your flu shot, the most effective way to protect yourself against influenza ...