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The Big Apple is “far from out of the woods” in its battle against the coronavirus, Mayor Bill de Blasio warned Thursday, as he announced a jump in both intensive care unit admissions and hospitalizations.

People in ICUs throughout the city’s 11 hospitals climbed from 868 on Monday to 887 on Tuesday, while the number of COVID-19 infected people hospitalized increased from 370 to 386 in that same 24-hour span, the mayor said in a conference call with reporters.

“We should never underestimate this disease,” de Blasio said, adding that the numbers, “tell us we got a lot more work to do.”

The percentage of people tested who are positive for coronavirus also went up citywide, from 53 percent on Monday to 55 percent on Tuesday.

“These indicators tell us a tough truth some days about the fact that it won’t be easy,” the mayor said, adding, “This was a tough day.”

“This is not what we’re looking for, but we know we’re gonna’ do this stage by stage, step by step and it just reminds us that we have to stick to it,” de Blasio said.