
What's the science behind CDC's decision to say fully vaccinated people don't need masks?
CNN
A fresh batch of data from a big study of healthcare workers across the country helped prompt the CDC to say fully vaccinated people can go without masks in most circumstances, the agency said Friday.
The study found that real-life use of the Moderna and Pfizer vaccines provided 94% protection for the front-line workers immunized at the beginning of the vaccine rollout. A single dose provided 82% protection, the CDC-led team reported in the agency's weekly report, the MMWR. It was the findings from the new study, on top of earlier studies, that pushed CDC to decide to loosen its advice on who needs to wear a mask and when, CDC Director Dr. Rochelle Walensky said.More Related News

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