Mark Wilson / Getty Images Updated July 28, 2021 at 6:01 PM ET The U.S. Department of Defense has issued directions that require anyone inside its facilities to wear a mask, even if they're vaccinated. The updated requirement applies to all service members, federal employees, onsite contractors, and visitors, and requires masks to be worn in indoor facilities and installations in areas of "substantial or high transmission," according to a statement from Deputy Pentagon Press Secretary Jamal Brown. The update rescinds a previous mask guidance, which since May had allowed fully vaccinated Department of Defense personnel to not wear a mask indoors or outdoors.