Large populational study finds prior SARS-CoV-2 infection reduces the risk of breakthrough infection following mRNA vaccination.

Association of Prior SARS-CoV-2 Infection With Risk of Breakthrough Infection Following mRNA Vaccination in Qatar – JAMA

Commentaries:

Vaccine plus previous infection may offer enhanced COVID-19 protection – CIDRAP

Prior SARS-CoV-2 infection and risk of breakthrough infection following mRNA vaccination – News Medical

Commentary on Twitter

Study found prior #SARSCoV2 infection was associated with lower risk for breakthrough infection among persons receiving the SARS-CoV-2 mRNA vaccines; however, the observational study design precludes direct comparison of infection risk btwn the 2 vaccines https://t.co/1RLuKSGPjy

— JAMA (@JAMA_current) November 1, 2021