U.S. health officials say vaccinated teachers and students don't need to wear masks inside school buildings.
The Centers for Disease Control and Prevention announced the new guidelines Friday.
The changes come after a growing national vaccination campaign in which children as young as 12 are eligible to get shots, as well as a general decline in recent months in COVID hospitalizations and deaths.
The guidance generally leaves it to local officials to figure out how to ensure the unvaccinated are using precautions while letting those who are fully protected go mask-free.
The biggest questions will be at middle schools where some students are eligible for shots and others aren't.