WASHINGTON - A surge by the rapidly spreading COVID-19 Delta variant is swamping hospitals, leading to new mask rules and is prompting mandatory vaccinations across the U.S.CLICK HERE FOR MORE CORONAVIRUS COVERAGEHere’s what the Centers for Disease Control and Prevention (CDC) says about the Delta variant, its symptoms, characteristics and other things to watch for:WHAT WE KNOWViruses constantly change through mutation, and new variants of a virus are expected to occur.
Sometimes new variants emerge and disappear. Other times, new variants persist. Multiple variants of the virus that causes COVID-19 have been documented in the United States and globally during this pandemic.