July 27, 2021 The CDC is now recommending vaccinated Americans wear face coverings indoors in certain parts of the country and in all K-12 schools. SHOW TRANSCRIPT The CDC is changing its mask guidance for Americans... as cases of the Delta COVID variant surge. The CDC now says vaccinated Americans should wear a mask indoors where coronavirus cases are substantial or high...that applies to just over 60% of the country. "The viral load of the unvaccinated people is indistinguishable from the breakthrough infections from the vaccinated people," said CDC Director Rochelle Walensky. The change up comes about two months after the CDC said vaccinated Americans could lose the mask in most situations. But now... new evidence that even vaccinated Americans with so-called “breakthrough” cases can still transmit the virus to others.