More than 79% of the United States population is vaccinated, raising questions about the COVID vaccine’s efficacy. QUICK FACTS: More than a third of U.S. counties are in a COVID-19 “red” zone, according to data from the Centers for Disease Control (CDC), which means that there are high levels of community transmission and hospitalization in … Continue reading In Highly Vaccinated U.S., More Than a Third of Counties Are In COVID ‘Red’ Zone: C.D.C.