New guidance from the Centers for Disease Control and Prevention suggested it’s safe for fully vaccinated students and teachers to go without masks indoors. However, School District of Philadelphia Superintendent William Hite said the district will keep its mask requirement, based on the CDC’s recommendation that students be kept at least three feet apart and that unvaccinated people keep wearing masks.

Masks Will Be Required for Philadelphia Public School Students in the Fall – NBC10 Philadelphia (nbcphiladelphia.com)