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Kang M, Yi Y, Li Y, Sun L, et al. Effectiveness of Inactivated COVID-19 Vaccines Against Illness Caused by the B.1.617.2 (Delta) Variant During an Outbreak in Guangdong, China : A Cohort Study. Ann Intern Med 2022 Feb 1. doi: 10.7326/M21-3509.
PMID: 35099990


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