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The number of coronavirus vaccinations administered in Massachusetts rose by 54,855 to 1,868,847, state officials reported Wednesday.

The number of new vaccinations was greater than on Tuesday, when 44,340 were reported.

The total number of shots administered amounted to 81.3 percent of the 2,298,600 doses shipped to providers in the state so far, the Department of Public Health said.

The total shots administered included 1,281,680 first shots and 587,167 second shots. Those who have gotten their second shot of the currently approved two-dose vaccines are considered fully vaccinated. A one-dose vaccine from Johnson & Johnson is arriving this week.

Massachusetts is in the midst of a high-stakes campaign to vaccinate 4.1 million adults in an effort to bring an end to a pandemic that has sickened hundreds of thousands and caused nearly 16,000 deaths in the state.

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The department, in a separate report, announced 1,553 new confirmed coronavirus cases, bringing the state’s total to 553,220. The department also reported 66 new confirmed coronavirus deaths, bringing the state’s total to 15,925.

The DPH said 28,550 people were estimated to have active cases of the potentially deadly virus, and 755 confirmed coronavirus patients were in the hospital.

Separately, UMass Memorial Health Care announced Wednesday that a field hospital it has run at the DCU Center in Worcester is slated to close this month as the number of patients hospitalized for the coronavirus declines. They plan to stop operations by mid-March and decommission the site in mid-April if hospitalizations continue to drop.

The medical site helped alleviate the strain on Massachusetts hospitals during the winter surge of COVID-19, treating about 650 patients since it opened in early December. It also treated about 300 people during the first wave of COVID last spring.

The DPH also reported that 102,052 more tests had been conducted for coronavirus. The total number of tests administered climbed to more than 16.4 million. New antigen tests had been completed for 3,890 people, bringing that total to 568,678.

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The DPH reported that the seven-day average rate of positive tests, which is calculated from the total number of tests administered, was at 1.82 percent.

The department said the rate would be 3.0 percent if the effect of college testing programs — in which asymptomatic people can be tested repeatedly in an effort to rapidly identify new cases — is factored out.

The number of cases is down sharply from the peak of the second surge early this year, though recently it has appeared to stabilize at a level that is still above the summer’s lows. Public officials are concerned about a possible resurgence because of new coronavirus variants, and they’re asking people to continue taking precautions and to get vaccinated when it’s their turn.

Priyanka Dayal McCluskey of the Globe Staff contributed to this story.


Martin Finucane can be reached at martin.finucane@globe.com.