Comparison of Waning Neutralizing Antibody Responses Against the Omicron Variant 6 Months After Natural Severe Acute Respiratory Syndrome Coronavirus 2 Infection (With or Without Subsequent Coronavirus Disease 2019 [COVID-19] Vaccination) Versus 2-Dose COVID-19 Vaccination.

Lim, So Yun; Park, Soonju; Kim, Ji Yeun; Kim, Seungtaek; Jee, Youngmee; Kim, Sung-Han · Clin Infect Dis · 2022

prospective_cohort · Level II

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Abstract

Following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, subsequent ChAdOx1 nCoV-19 vaccination induced similar neutralizing antibody levels against the original strain but significantly higher levels against the Omicron variant compared to those who were not vaccinated. Prior SARS-CoV-2 infection exhibited higher neutralization antibody titers than vaccination alone for both original strains and the Omicron variant.

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