The Centers for Disease Control and Prevention (CDC) on Feb. 25 drastically changed a key measure that is used by officials across the country to determine whether or not to require mask-wearing. The federal agency now says nearly three-quarters of Americans don’t need to wear masks because they live in areas with low or medium community risk from COVID-19. The dramatic switch comes because the CDC switched from only using COVID-19 cases as a factor and are taking into account other metrics, including hospitalizations. “This approach focuses on directing our prevention efforts towards protecting people at high risk for severe ailments and preventing hospitals. and healthcare systems,” Dr. Rochelle Walensky, the CDC’s director, told reporters on a call. We “came up with indicators, including new hospital admissions and hospital beds utilized, and comprehensive them with case incidents to really create a packet of metrics to be able to understand what’s …