Birdwatch Note Rating
2024-03-29 20:58:13 UTC - HELPFUL
Rated by Participant: 05CFA61B771C28C3535E8EC08F63AD7F99DA88A327B28B42EB7E6132AA6AB1BF
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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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