U.S. Flu Vaccines Updated for 2024-2025 Season 

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All 2024-2025 flu vaccines in the United States will be trivalent (three-component) vaccines. Trivalent U.S. flu vaccines will include vaccine viruses or viral proteins from one influenza A(H1N1) virus, one influenza A(H3N2) virus, and one influenza B/Victoria lineage virus. They will not include an influenza B/Yamagata lineage vaccine virus or viral protein component.     LEARN MORE