CDC Reports Flu Vaccine 42% Effective This Season

The flu vaccine's effectiveness aligns with previous years, offering substantial protection against influenza A and B.

This season's flu vaccine has shown a 42% overall effectiveness, in line with effectiveness rates from recent years.
Children have experienced higher protection rates, with vaccine effectiveness ranging from 52% to 61% against hospitalizations.
The vaccine has been particularly effective against influenza B, with adults showing a 78% effectiveness in preventing outpatient visits.
Despite the vaccine's effectiveness, declining vaccination rates may impact the overall reduction in flu hospitalizations and deaths.
A major change is expected for the 2024-2025 flu vaccine, with a shift from quadrivalent to trivalent formulations anticipated.