Social behavior

Gov. Greg Abbott of Texas announced on Tuesday that he was abandoning the state’s face mask requirement imposed amid the coronavirus pandemic and will allow businesses to operate at full capacity, saying “it is now time to open Texas 100 percent.”

The wide-reaching announcement in Texas came as similar rules were being lifted elsewhere: Restaurants, schools, movie theaters and bars are reopening and shedding restrictions in some of the nation’s biggest cities and most populous states, prompting more Americans to emerge after months of isolation and bringing the country closer to a semblance of life before the coronavirus pandemic.

WASHINGTON — Federal health officials warned impatient governors on Friday against relaxing pandemic control measures, saying that a recent steep drop in coronavirus cases and deaths in the United States may be leveling off at a very high number — a shift that the director of the Centers for Disease Control and Prevention said “must be taken extremely seriously.”