View ORCID ProfileJill M Ferdinands research epidemiologist,
Suchitra Rao associate professor of pediatrics,
Brian E Dixon director of public health informatics,
Patrick K Mitchell senior epidemiologist,
Malini B DeSilva internal medicine specialist,
Stephanie A Irving project director et al
Ferdinands J M, Rao S, Dixon B E, Mitchell P K, DeSilva M B, Irving S A et al.
Waning of vaccine effectiveness against moderate and severe covid-19 among adults in the US from the VISION network: test negative, case-control study
BMJ 2022; 379 :e072141
doi:10.1136/bmj-2022-072141