SARS-CoV-2 Breakthrough Infections after introduction of 4 COVID-19 Vaccines, South Korea, 2021. Yi S, Choe YJ, Kim J, Kim YY, et al. Emerg Infect Dis 2022;28:753-756.

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Yi S, Choe YJ, Kim J, Kim YY, et al. SARS-CoV-2 Breakthrough Infections after introduction of 4 COVID-19 Vaccines, South Korea, 2021. Emerg Infect Dis 2022;28:753-756.
PMID: 35202529