Pfizer's mRNA flu vaccine worked better than a standard flu shot in a large Phase 3 trial, researchers reported.

The mutated strain, known as subclade K, is causing a surge in cases in the United Kingdom, Canada, and Japan. Here's what to ...

When it comes to the upcoming influenza season, there's a potential mismatch between the vaccine and what might circulate, raising the risk that the flu season could be severe. And that risk could be ...