socialobserver: Post-infection immunity was very protective against Delta, the C.D.C. reports, but vaccines still offer the best defense.

Wednesday, January 19, 2022

Post-infection immunity was very protective against Delta, the C.D.C. reports, but vaccines still offer the best defense.

By BY APOORVA MANDAVILLI from NYT Health https://ift.tt/3AsFdMB

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