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Janssen COVID-19 vaccine long-term efficacy

The Janssen COVID-19 vaccine's long-term efficacy and safety, with a focus on the lack of multi-year randomized trial follow-up

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Jan 8, 2026

Which autoimmune disorders have been temporally associated with the J&J (Ad26.COV2.S) vaccine in pharmacovigilance databases?

Pharmacovigilance databases and post‑marketing reviews have repeatedly flagged a small set of immune‑mediated disorders temporally linked to the Janssen Ad26.COV2.S vaccine—most prominently vaccine‑in...