The studies that prompted the Centers for Disease Control and Prevention (CDC) to change their mask guidance for vaccinated persons are not available, a spokesperson told The Epoch Times on Wednesday. “They have not been published yet,” the spokesperson said. Dr. Rochelle Walensky, the CDC’s director, told reporters on July 27 that she had seen “new scientific data from recent outbreak investigations” indicating the Delta variant of the virus that causes COVID-19 was presenting more uniquely than other strains. “Information from several states and other countries indicates that in rare occasions, some vaccinated people infected with the Delta variants after vaccination may be contagious and spread the virus to others,” she said. That motivated officials at the agency to change masking guidance. Fully vaccinated persons, told two months ago they could stop wearing masks indoors, are now being told to don the coverings when inside. Multiple states and businesses quickly adopted …