Effectiveness of the Johnson & Johnson vaccine in health-care workers in South Africa in a period when the beta and then the delta SARS-CoV-2 variants of concerns were dominant.

Effectiveness of the Ad26.COV2.S vaccine in health-care workers in South Africa (the Sisonke study): results from a single-arm, open-label, phase 3B, implementation study – The Lancet

Invited Commentary: Sisonke: reaching several goals together – The Lancet

Commentary on Twitter (thread – click for more)

Single-dose Ad26.COV2.S vaccine in healthcare workers in South Africa shows effectiveness against severe #COVID19 outcomes—and against beta and delta variants, study indicates.https://t.co/S13Ia1H8BT pic.twitter.com/XgbXGcT9XR

— The Lancet (@TheLancet) March 19, 2022