The Centers for Disease Control and Prevention on Tuesday recommended people wear masks in kindergarten through 12th-grade schools.

“The CDC recommends that everyone in K-12 schools wear a mask indoors, including teachers, staff, students and visitors, regardless of vaccination status,” said CDC Director Dr. Rochelle Walensky in a briefing. “Children should return to full-time, in-person learning in the fall with proper prevention strategies in place.”

The updated CDC guidelines also called for masks for other indoor areas in parts of the U.S. where the coronavirus is surging.

This change comes around two months after officials had said masks were no longer needed inside for the vaccinated. That was before the highly contagious delta variant became the dominant strain across the country.