COVID-19 vaccines, prior infection reduce transmission of omicron, finds study of California prisons

Vaccination and boosting, especially when recent, helped to limit the spread of COVID-19 in California prisons during the first omicron wave, according to an analysis by researchers at UC San Francisco that examined transmission between people living in the same cell.

source https://medicalxpress.com/news/2022-12-covid-vaccines-prior-infection-transmission.html