CDC
U.S. flu activity hits 15-year peak
February 11, 2025

CDC's Influenza Surveillance Report published February 7 indicates that seasonal influenza activity remains elevated and continues to rise across the U.S. This week, 4,377 viruses were reported, predominantly influenza A. Outpatient respiratory illness has been above baseline nationally for ten consecutive weeks, with 10 pediatric deaths reported, bringing the season total to 57. CDC estimates at least 24 million flu illnesses, 310,000 hospitalizations, and 13,000 deaths so far this season.
As a result, the U.S. is experiencing its most intense winter virus season in 15 years, with flu activity driving a high percentage of doctor’s office visits. According to AP News, flu-like symptoms are more prevalent than any winter since the 2009-2010 swine flu pandemic. While COVID-19 and RSV are declining, flu has led to school closures in some states, including a district near Fort Worth, Texas. Flu activity is particularly high in the South, Southwest, and western states.
CDC continues to recommend annual flu vaccination for everyone aged 6 months and older and emphasizes early antiviral treatment for high-risk patients.
Sources:
(2025, February 7). CDC. Weekly US Influenza Surveillance Report: Key Updates for Week 5, ending February 1, 2025. https://www.cdc.gov/fluview/surveillance/2025-week-05.html
Stobbe, M. (2025, February 7). AP News. Flu season in the US is the most intense it’s been in at least 15 years. https://apnews.com/article/us-flu-season-cdc-a640e8fe0bffa4a8f6bdbd7ea8e5608a
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