The vaccine and a dominant variant may not match this year, which combined with low vaccine rates could make for a severe flu season.

It can be hard to sort through the conflicting and evolving information about vaccines. Here’s the latest guidance on Covid boosters, flu shots, childhood immunizations and more. By Maggie Astor Dani ...

The United States may be heading into its second severe flu season in a row, driven by a mutated strain called subclade K ...

With a new flu virus variant circulating, scientists fear more sickness this winter. The vaccine may be slightly less ...

America's withdrawal from the World Health Organization is affecting the ability of U.S. scientists to track flu and other pathogens. That could be a blow to the development of the 2025 flu vaccine.