Flu shots are typically 40 percent to 60 percent effective in any given season, though this year fell short of that mark. The ultimate goal is a universal vaccine that would operate more like a ...

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 ...

The United States is facing one of its most severe flu seasons in decades, data show. Infections and hospitalizations are surging, driven by a new mutated influenza A variant, H3N2 "subclade K." ...