Here's why the CDC recommends wearing masks indoors even if you've been fully vaccinated against COVID-19
- Written by Peter Chin-Hong, Associate Dean for Regional Campuses, University of California, San Francisco

Vaccinated people need to mask up again, according to the U.S. Centers for Disease Control and Prevention. On July 27, 2021, the CDC recommended that everyone in areas with high COVID-19 infection rates wear masks in public indoor spaces, regardless...