National seroepidemiological study of COVID-19 after the initial rollout of vaccines: Before and at the peak of the Omicron-dominant period in Japan.

Influenza Other Respir Viruses · 2023 · PMC9890143 · PMID 36824391

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a decreasing trendno p-value reported

There was a decreasing trend in antibody titers as the age increased.

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