Birdwatch Note Rating
2024-03-29 06:48:16 UTC - HELPFUL
Rated by Participant: 6F66662F622CFC7711D99212AB6A826C51F207DEA52B12B5DB19B177C5120C8B
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Original Note:
According to the Center for Disease Control and Prevention, yearly flu vaccines protect against 4 influenza viruses due to "antigenic drift," where small genetic changes cause surface protein alterations. This ensures continued effectiveness against evolving flu strains. https://www.cdc.gov/flu/prevent/flushot.htm
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