More schools are reopening in the U.S.

The U.S. is seeing an almost-universal return of schools that were in-person as of November, as well as a gradual return in parts of the country that had been virtual for almost a year.

Elementary schools in Ohio, New Mexico, Oregon, Washington, Maryland and Virginia began in-person instruction this week, after being closed since last March.

Background: With proper precautions, the CDC said it is possible for schools to conduct some form of in-person learning even with various levels of community spread.

And while guidance calls for mitigation strategies like masking and social distancing, some states are also securing vaccine for teachers and staff, offering surveillance testing or are installing ventilation systems or other large venues for classes.