Early Estimates of Bivalent mRNA Vaccine Effectiveness in Preventing COVID-19–Associated Emergency Department or Urgent Care Encounters and Hospitalizations Among Immunocompetent Adults — VISION Network, Nine States, September–November 2022

Autor: Mark W. Tenforde, Zachary A. Weber, Karthik Natarajan, Nicola P. Klein, Anupam B. Kharbanda, Edward Stenehjem, Peter J. Embi, Sarah E. Reese, Allison L. Naleway, Shaun J. Grannis, Malini B. DeSilva, Toan C. Ong, Manjusha Gaglani, Jungmi Han, Monica Dickerson, Bruce Fireman, Kristin Dascomb, Stephanie A. Irving, Gabriela Vazquez-Benitez, Suchitra Rao, Deepika Konatham, Palak Patel, Kristin E. Schrader, Ned Lewis, Nancy Grisel, Charlene McEvoy, Kempapura Murthy, Eric P. Griggs, Elizabeth A. K. Rowley, Ousseny Zerbo, Julie Arndorfer, Margaret M. Dunne, Kristin Goddard, Caitlin Ray, Yan Zhuang, Julius Timbol, Morgan Najdowski, Duck-Hye Yang, John Hansen, Sarah W. Ball, Ruth Link-Gelles
Rok vydání: 2023
Předmět:
Zdroj: MMWR. Morbidity and Mortality Weekly Report. 71:1637-1646
ISSN: 1545-861X
0149-2195
Popis: During June-October 2022, the SARS-CoV-2 Omicron BA.5 sublineage accounted for most of the sequenced viral genomes in the United States, with further Omicron sublineage diversification through November 2022.* Bivalent mRNA vaccines contain an ancestral SARS-CoV-2 strain component plus an updated component of the Omicron BA.4/BA.5 sublineages. On September 1, 2022, a single bivalent booster dose was recommended for adults who had completed a primary vaccination series (with or without subsequent booster doses), with the last dose administered ≥2 months earlier (1). During September 13-November 18, the VISION Network evaluated vaccine effectiveness (VE) of a bivalent mRNA booster dose (after 2, 3, or 4 monovalent doses) compared with 1) no previous vaccination and 2) previous receipt of 2, 3, or 4 monovalent-only mRNA vaccine doses, among immunocompetent adults aged ≥18 years with an emergency department/urgent care (ED/UC) encounter or hospitalization for a COVID-19-like illness.
Databáze: OpenAIRE
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