The CDC issued new guidelines Friday for schools to reopen safely. The agency says vaccinating teachers is not a prerequisite, but schools must adhere to strict measures including mandatory face masks, physical distancing and contract tracing. CNN notes 89% of U.S. children live in what the CDC considers a “red zone,” an area with high levels of community transmission, for which the agency recommends virtual classrooms for middle and high schools and hybrid learning for elementary schools. A recent National Education Association survey found only 18% of teachers who responded were vaccinated, although a large majority wanted to be. White teachers have been vaccinated at over twice the rate of Black teachers around the U.S.