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The number of known coronavirus cases in the District, Maryland and Virginia stood at 3,411 on Tuesday, with 1,661 cases in Maryland, 1,251 in Virginia and 499 in the District. The total of virus-driven deaths stood at 31 in Virginia, 23 in Maryland and 9 in the District, for a total of 63 fatalities in the region.

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 Gov. Larry Hogan (R) said in an interview on C-Span that an asymptomatic worker is believed to have carried the coronavirus into a Carroll County nursing home where 77 residents have tested positive. Three more residents of the facility have died, officials said Tuesday.

• D.C. Mayor Muriel E. Bowser (D) said she does not expect the city to levy criminal penalties for violating her stay-at-home order, which allows the city to jail people for up to 90 days or fine them up to $5,000.

• George Washington University Hospital is preparing to offer drive-through coronavirus testing, as covid-19 infections continue to increase in the Washington area.