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机译:Relative Effectiveness of Coronavirus Disease 2019 Vaccination and Booster Dose Combinations Among 18.9 Million Vaccinated Adults During the Early Severe Acute Respiratory Syndrome Coronavirus 2 Omicron Period—United States, 1 January 2022 to 31 March 2022
COVID-19 Emergency Response Team, Centers for Disease Control and Prevention, Atlanta, Georgia, USA;
COVID-19; SARS-CoV-2 vaccine effectiveness; booster dose; JJ.;