摘要

For frontline workers, COVID-19 mRNA vaccines, Pfizer-BioNTech and Moderna, are effective against viral infection, but less effective during Delta variant spread.

詳細內容

For frontline workers, COVID-19 mRNA vaccines, Pfizer-BioNTech and Moderna, are effective against viral infection, but less effective during Delta variant spread.

關鍵發現

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萃取時間: 2026-02-05T15:13:36Z 資料來源: CDC MMWR