Effectiveness of mRNA COVID-19 vaccines against Omicron and Delta variants in a matched test-negative case-control study among US veterans

Young-Xu Y, Zwain GM, Izurieta HS, Korves C, Powell EI, Smith J, Balajee A, Holodniy M, Beenhouwer DO, Rodriguez-Barradas MC, Brown ST, Marconi VC. Effectiveness of mRNA COVID-19 vaccines against Omicron and Delta variants in a matched test-negative case-control study among US veterans. BMJ Open. 2022 Aug 3;12(8):e063935. doi: 10.1136/bmjopen-2022-063935. PMID: 35922100; PMCID: PMC9352567.


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