Daily Business BriefingJuly 28, 2021Updated July 28, 2021, 12:00 p.m. ETJuly 28, 2021, 12:00 p.m. ET The Centers for Disease Control and Prevention revised its mask guidance for vaccinated Americans on Tuesday.Credit…Benjamin Norman for The New York TimesTwo months after the Centers for Disease Control and Prevention said it was OK for vaccinated people to forgo masks indoors, the agency reversed course on Tuesday, saying that Americans should put masks on again — at least in areas where the coronavirus infection rate is high.The official guidance — swayed by research on the Delta variant, which is causing rising case counts and “breakthrough” infections of …
