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- W3186580147 abstract "With the emergency use authorization of multiple vaccines against SARS-CoV-2 infection, data are urgently needed to determine their effectiveness in a real-world setting.To evaluate the short-term effectiveness of vaccines in preventing SARS-CoV-2 infection.Test-negative case-control study using conditional logistic regression.U.S. Department of Veterans Affairs health care system.All veterans who had testing for SARS-CoV-2 infection between 15 December 2020 and 4 March 2021 and no confirmed infection before 15 December 2020.SARS-CoV-2 vaccination with either the BNT-162b2 (Pfizer-BioNTech) or mRNA-1273 (Moderna) vaccine as part of routine clinical care.Effectiveness of vaccination against confirmed SARS-CoV-2 infection.Among 54 360 persons who tested positive and 54 360 propensity score-matched control participants, the median age was 61 years, 83.6% were male, and 62% were White. Median body mass index was 31 kg/m2 among those who tested positive and 30 kg/m2 among those who tested negative. Among those who tested positive, 9800 (18.0%) had been vaccinated; among those who tested negative, 17 825 (32.8%) had been vaccinated. Overall vaccine effectiveness 7 or more days after the second dose was 97.1% (95% CI, 96.6% to 97.5%). Effectiveness was 96.2% (CI, 95.5% to 96.9%) for the Pfizer-BioNTech BNT-162b2 vaccine and 98.2% (CI, 97.5% to 98.6%) for the Moderna mRNA-1273 vaccine. Effectiveness remained above 95% regardless of age group, sex, race, or presence of comorbidities.Predominantly male population; lack of data on disease severity, mortality, and effectiveness by SARS-CoV-2 variants of concern; and short-term follow-up.Currently used vaccines against SARS-CoV-2 infection are highly effective in preventing confirmed infection in a high-risk population in a real-world setting.None." @default.
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- W3186580147 date "2021-10-01" @default.
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- W3186580147 title "SARS-CoV-2 Vaccine Effectiveness in a High-Risk National Population in a Real-World Setting" @default.
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- W3186580147 doi "https://doi.org/10.7326/m21-1577" @default.
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