* The CDC use a mathematical model to estimate the numbers of influenza illnesses, medical visits, hospitalizations and deaths to inform policy and communications related to influenza prevention and control.
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Number of influenza cases during the 2023-2024 flu season in the U.S. by age group
The CDC estimated that those aged 18 to 49 accounted for the highest number of symptomatic cases of influenza during the 2023 to 2024 flu season. This statistic shows the estimated number of symptomatic influenza cases in the U.S. during the 2023-2024 influenza season, by age group.
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CDC. (November 20, 2024). Number of symptomatic influenza cases during the 2023-2024 influenza season in the United States, by age group* [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 20, 2026, from /statistics/1127611/influenza-us-case-estimate-by-age-group/
CDC. "Number of symptomatic influenza cases during the 2023-2024 influenza season in the United States, by age group*." Chart. November 20, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 20, 2026. /statistics/1127611/influenza-us-case-estimate-by-age-group/
CDC. (2024). Number of symptomatic influenza cases during the 2023-2024 influenza season in the United States, by age group*. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 20, 2026. /statistics/1127611/influenza-us-case-estimate-by-age-group/
CDC. "Number of Symptomatic Influenza Cases during The 2023-2024 Influenza Season in The United States, by Age Group*." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 20 Nov 2024, /statistics/1127611/influenza-us-case-estimate-by-age-group/
CDC, Number of symptomatic influenza cases during the 2023-2024 influenza season in the United States, by age group* ÌÇÐÄÆƽâ°æ, /statistics/1127611/influenza-us-case-estimate-by-age-group/ (last visited July 20, 2026)
Number of symptomatic influenza cases during the 2023-2024 influenza season in the United States, by age group* [Graph], CDC, November 20, 2024. [Online]. Available: /statistics/1127611/influenza-us-case-estimate-by-age-group/
