Centers for Disease Control and Prevention Director Dr. Rochelle Walensky is now saying that “new data” shows breakthrough cases in vaccinated individuals can spread as much virus as an unvaccinated person.The CDC has now changed course yet again and is now calling for fully vaccinated Americans to wear masks indoors in places with “substantial or high” transmission — including “universal masking” in schools.“In rare occasions, some vaccinated people infected with a delta variant after vaccination may be contagious and spread the virus to others,” Walensky said during a press briefing on Tuesday. “This new science is worrisome, and unfortunately warrants...