Effectiveness of Vaccination in Preventing COVID-19: A Community Study Comparing Four Vaccines.

Vaccines (Basel) · 2023 · PMC10053943 · PMID 36992128

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a decreasing trendno p-value reported

The two vector vaccines did not show such a pattern, in that the effectiveness of Gam-COVID-Vac had a decreasing trend with age, while ChAdOx1 showed a paradoxical poorest effectiveness in the middle age group, however within very broad CIs. 4.

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