Tuesday, July 27, 2021
California News Headlines


Why should vaccinated people wear masks? UCSF expert explains.

COVID-19 expert Dr. Bob Wachter said the rate of breakthrough infections is small but real.

By SF Gate , in San Francisco , at July 21, 2021

Original article posted at https://www.sfgate.com/bayarea/article/Why-unvaccinated-people-wear-mask-UCSF-Wachter-16327481.php

COVID-19 expert Dr. Bob Wachter said the rate of breakthrough infections is small but real.

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