The number of known coronavirus cases in the District, Maryland and Virginia stood at 11,766 on Thursday, with 6,186 cases in Maryland, 4,053 in Virginia and 1,527 in the District. The number of virus-related deaths was 138 in Maryland, 109 in Virginia and 33 in the District, for a total of 280 fatalities.

Here are some of the most significant and recent developments as the region responds to the pandemic of the novel coronavirus, which causes the disease covid-19:

• Maryland released coronavirus data by race for the first time Thursday that shows black residents are disproportionately being hit by the virus — a trend that has shown up in data elsewhere. The state is about 30 percent black, but black residents make up more than half of the deaths in cases in which a person’s race is known.

• Applications for unemployment benefits in the Washington region spiked again Thursday as the covid-19 outbreak continued to severely rattle the local and national economies. The number of claims filed in the District, Maryland and Virginia reached 272,559 over the last week.

• The District, Maryland and Virginia added 53 new fatalities on Thursday, the region’s largest single-day increase in fatalities, bringing the national capital region’s death toll to 280.