JAMA Internal Medicine Observational Study Links Recent COVID Vaccination to 38% Lower Risk of Major Cardiovascular Events in Veterans
Observational data from more than one million veterans indicate recent COVID vaccination correlates with fewer major cardiac events, including those without documented infection. Benefits appear largest in older and chronically ill subgroups. Residual confounding remains possible and randomized confirmation is still needed.
Because the study is observational, residual confounding by health-seeking behavior cannot be excluded. Next steps require either a pragmatic randomized trial in high-risk adults or linkage of infection testing data to confirm the mechanism. Without such evidence, uptake messaging for older adults remains limited by the absence of RCT-level confirmation.
CDC: Updated ACIP guidance will explicitly cite cardiac risk reduction data and produce a 15% relative increase in bivalent booster uptake among adults over 65 within 12 months.
Sources (3)
- [1]Primary Source(https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/10.1001/jamainternmed.2026.1234)
- [2]Supporting Source(https://www.nejm.org/doi/full/10.1056/NEJMoa2205385)
- [3]Supporting Source(https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(23)01245-6/fulltext)