Dr. Nirav Shah, director of the Maine Center for Disease Control and Prevention, speaks at a news conference Monday, March 16, 2020, in Augusta, Maine. Credit: Robert F. Bukaty | AP

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Another 20 cases of the new coronavirus have been confirmed in Maine, bringing the state total to 519. That’s up from 499 on Monday. Two more Mainers have died since Monday, bringing the state total to 12.

Ninety-nine Maine residents have been hospitalized with COVID-19, the illness caused by the coronavirus, while another 176 have recovered.

[Our COVID-19 tracker contains the most recent information on Maine cases by county]

The two most recent deaths include a male patient in his 50s and a female in her 80s, both from Cumberland County, according to Maine Center for Disease Control and Prevention Director Nirav Shah.

A majority of the cases have been in Maine residents over age 50, while they are evenly split between women and men, according to the Maine CDC.

Cumberland County continues to be the hardest hit where 253 cases have been confirmed. Cumberland and York County — with 115 cases — are the only two where “community transmission” has been confirmed, according to Shah.

There are two criteria for establishing community transmission: at least 10 confirmed cases and that at least 25 percent of those are not connected to either known cases or travel. Shah said last week that the second condition has not yet been “satisfied” in other counties.

Other cases have been detected in Androscoggin (23), Aroostook (2), Franklin (5), Hancock (2), Kennebec (26), Knox (9), Lincoln (9), Oxford (12), Penobscot (31), Sagadahoc (13), Somerset (4), Waldo (5) and Washington (1) counties. Information about where another nine cases were detected was not immediately available Tuesday.

The only county without a confirmed case is Piscataquis.

“You have to assume it’s there, and I would,” said Dora Mills, chief health improvement officer for the MaineHealth hospital system and a former director of the Maine Center for Disease Control and Prevention. “What we know from other places, the virus likely circulated for several weeks before they knew it was circulating.”

Maine State Police announced its first confirmed case of COVID-19 on Monday after “a sworn member of the department” tested positive for the virus.

The member’s duty included work at the Maine Turnpike Weigh Station in York, along the northbound lanes, in York County. State workers immediately closed the station and it underwent a thorough cleaning and reopened on Monday, according to Stephen McCausland, spokesperson for the Maine Department of Public Safety.

As of early Tuesday morning, the coronavirus has sickened at least 368,449 people in all 50 states, the District of Columbia, Puerto Rico, Guam, the Northern Mariana Islands and the U.S. Virgin Islands, as well as caused 10,933 deaths, according to Johns Hopkins University of Medicine.

Watch: How does COVID-19 spread?

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