After initially resisting issuing a statewide school mask mandate, Pennsylvania Gov. Tom Wolf (D) reversed course Tuesday and said that facial coverings will now be required at K-12 schools, early learning programs and child care centers. The governor announced the move in a press conference, arguing that the “aggressive delta variant has changed everything for us,” and that while Pennsylvania has a relatively high vaccination rate compared to some other states, the recent surges in cases could pose strains on local health care systems. “My office has received an outpouring of messages from parents asking the administration to protect all children by requiring masks in schools,” Wolf said in a statement. “The science is clear,” he added. “The Delta variant is highly transmissible and dangerous to the unvaccinated, many of whom are children too young to receive the vaccine.” “Requiring masks in schools will keep our students safer and in the classroom, where we all want them to be,” he argued.