CDC has released three new reports on the impact and severity of the 2024–2025 flu season in the United States, which was the most severe since 2017–2018. The reports highlight the effects of flu on children, the seriousness of pediatric complications, and the viruses that circulated most widely last season.
Key Findings:
- Pediatric Flu-Related Encephalopathy (IAE): CDC identified 109 cases in children. Over half (55%) were previously healthy, 74% required intensive care, and 19% died. Only 16% had received a flu vaccine.
- Pediatric Flu Deaths: 280 flu-related pediatric deaths were reported through Sept. 13, 2025. While 56% had an underlying health condition, many were otherwise healthy. Among those eligible with known vaccination status, 89% were not fully vaccinated.
- 2024–2025 Flu Season Summary: CDC classified the season as high severity, the worst since 2017–2018. The report also includes the updated composition for the 2025–2026 flu vaccines.
Flu Vaccine Guidance:
CDC continues to recommend that everyone 6 months and older receive a flu vaccine, ideally by the end of October. Vaccination is especially critical for those at higher risk, including young children, pregnant women, older adults, and people with certain chronic conditions. Talk with your doctor or pharmacist about vaccine options available for this season.
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