Covid-19 Rates by Time since Vaccination during Delta Variant Predominance
This article examines Covid-19 case and death rates among recipients of one of three FDA-approved vaccines. The data show that protection from infection attributable to the BNT162b2 and mRNA-1273 vaccine recipients and from death among older BNT162b2 recipients wanes over 6 months, whereas case and death rates among recipients of the Ad26.COV2.S vaccine are higher overall without a consistent pattern of waning immunity.
1989 ◽
Vol 54
(3)
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pp. 403-421
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