Adverse outcomes of SARS-CoV-2 infection with delta and omicron variants in vaccinated versus unvaccinated US veterans: retrospective cohort study.
Amy S B BohnertKyle KumbierMazhgan RownekiAshwin GuptaKristina BajemaDenise M HynesElizabeth VigliantiAnn M O'HareThomas OsborneEdward J BoykoYinong Young-XuTheodore J IwashynaMatthew MaciejewskiRichard SchildhouseDerek DimcheffGeorge N IoannouPublished in: BMJ (Clinical research ed.) (2023)
In veterans with recent healthcare use and high occurrence of multimorbidity, vaccination was robustly associated with lower odds of 30 day morbidity and mortality compared with no vaccination among patients infected with covid-19. The vaccination type and number of doses had a significant association with outcomes.