Pre-Omicron COVID-19 Transmission Three Times Higher Among Unvaccinated

People with breakthrough cases of COVID-19 earlier this year were much less likely than unvaccinated COVID-19 patients to infect others, a population-based study from Germany shows. The findings are based on data collected until August 2021, before the Omicron variant emerged. “The number of transmissions from unvaccinated controls was three […]