Jennifer DeCuir, Amanda B Payne, Wesley H Self, Elizabeth A K Rowley, Kristin Dascomb, Malini B DeSilva, Stephanie A Irving, Shaun J Grannis, Toan C Ong, Nicola P Klein, Zachary A Weber, Sarah E Reese, Sarah W Ball, Michelle A Barron, Allison L Naleway, Brian E Dixon, Inih Essien, Daniel Bride, Karthik Natarajan, Bruce Fireman, Ami B Shah, Erica Okwuazi, Ryan Wiegand, Yuwei Zhu, Adam S Lauring, Emily T Martin, Manjusha Gaglani, Ithan D Peltan, Samuel M Brown, Adit A Ginde, Nicholas M Mohr, Kevin W Gibbs, David N Hager, Matthew Prekker, Amira Mohamed, Vasisht Srinivasan, Jay S Steingrub, Akram Khan, Laurence W Busse, Abhijit Duggal, Jennifer G Wilson, Steven Y Chang, Christopher Mallow, Jennie H Kwon, Matthew C Exline, Cristie Columbus, Ivana A Vaughn, Basmah Safdar, Jarrod M Mosier, Estelle S Harris, Jonathan D Casey, James D Chappell, Carlos G Grijalva, Sydney A Swan, Cassandra Johnson, Nathaniel M Lewis, Sascha Ellington, Katherine Adams, Mark W Tenforde, Clinton R Paden, Fatimah S Dawood, Katherine E Fleming-Dutra, Diya Surie, Ruth Link-Gelles
In September 2023, CDC's Advisory Committee on Immunization Practices recommended updated 2023-2024 (monovalent XBB.1.5) COVID-19 vaccination for all persons aged ≥6 months to prevent COVID-19, including severe disease. However, few estimates of updated vaccine effectiveness (VE) against medically attended illness are available. This analysis evaluated VE of an updated COVID-19 vaccine dose against COVID-19-associated emergency department (ED) or urgent care (UC) encounters and hospitalization among immunocompetent adults aged ≥18 years during September 2023-January 2024 using a test-negative, case-control design with data from two CDC VE networks...
February 29, 2024: MMWR. Morbidity and Mortality Weekly Report