Status of Humoral and Cellular Immune Responses within 12 Months following CoronaVac Vaccination against COVID-19.

mBio · 2022 · PMC9239277 · PMID 35475648

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a significant trendno p-value reported

In addition, a significant trend of waning antibody levels with time has been observed in both AstraZeneca ChAdOx1 and Pfizer BNT162b2, with antibody levels decreasing by about 5-fold for ChAdOx1 and by about 2-fold for BNT162b2, between 21 and 41 days and 70 days or more after the second dose, respectively ( 10 ).

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