Moderna’s mRNA flu vaccine gave more protection against illness than the standard flu shot in a phase 3 clinical trial, according to published results.

Every year, flu vaccines are updated to match the flu viruses expected to circulate. For 2026, the vaccine focuses on several influenza strains that research predicts will be most prevalent. This ...

CLEVELAND, Ohio — This season’s influenza vaccine may have been less effective than last season’s, because it was not well matched against the flu strains in circulation, according to an analysis by ...

Health officials say the 2025-2026 flu season’s vaccine offered less protection than usual, as a mutated strain of influenza A dominated cases across the U.S. A strain known as H3N2 “subclade K” ...

Sickness is surging across the United States following the holiday season, bringing thermometers and medicine to homes amid presents and Christmas dinner leftovers. New York state especially has been ...

This season's influenza vaccine effectiveness rates against outpatient visits and hospitalizations may be lower than last season's, according to an interim CDC analysis. During the current flu season, ...

Explainer - Where can you get your flu vaccine this year, and what will it cost? Here's what you need to know.

The World Health Organization has recommended updating all three viral strains included in influenza vaccines for the Northern Hemisphere’s 2026 flu season. The changes include two influenza A strains ...

Activity during the current flu season is growing to severe levels, with the percentage of doctors’ visits for flu-like illnesses reaching the highest level on record, according to the most recent ...