Vaccine? | How Effective Is The Flu

For the current , the vaccine is estimated to be 36% effective overall at preventing medically attended flu illness. While this is lower than the typical 40–60% range, it still significantly reduces the risk of severe complications, hospitalizations, and deaths. Key Effectiveness Data (2025–26 Season) Overall Effectiveness: 36% (interim estimate). By Age Group:

22%–34% effective against outpatient visits and 30% against hospitalizations. How Effective is the Flu Vaccine?

30%–42% effective depending on age and setting. Influenza B: 45%–71% effective. Why Effectiveness Varies For the current , the vaccine is estimated