Effectiveness of A Fourth Dose of COVID-19 mRNA Vaccine in the Elderly Population During the Omicron BA.2 and BA.5 Circulation: A Nationwide Cohort Study in Korea (K-COVE)
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DOI: 10.1093/ofid/ofad109
Abstract: Abstract We estimate the effectiveness of a fourth dose booster of coronavirus disease 2019 mRNA vaccine in individuals aged ≥60 years during Omicron BA.2 and BA.5 circulation in Korea. The effectiveness against critical infection was… read more here.
Keywords: effectiveness fourth; fourth dose; mrna vaccine; omicron circulation ... See more keywords