Four more people in the Big Apple have died from the coronavirus and 339 more are confirmed to be infected as testing increased across the five boroughs on Thursday, City Hall said.

The new figures bring the city’s total number of coronavirus cases to 3,954 — a significant jump (9.4%) from the 3,615 cases that were reported earlier on Thursday.

A total of 26 city residents have now died from the illness.

Brooklyn continues to be the borough with the most infected, at 1,195 cases, according to the new tally. In Queens there are 1,042 cases; 1,038 in Manhattan; 496 in the Bronx; and 179 on Staten Island.

A total of seven homeless people living in city shelters have tested positive for the coronavirus, a spokesman for the city Department of Homeless Services said Thursday night.

As the city numbers continue to grow, Mayor Bill de Blasio demanded the federal government step up to provide a shipment of medical supplies by April to help city health workers battling the pandemic.

“From the very beginning, New York City has been fighting COVID-19 with one hand tied behind our back,” de Blasio said in a statement.

“We cannot leave our health care workers vulnerable, and we need the federal government to step up and give our frontline workers the tools they need to save lives all across our City.”

By Thursday night, 1,700 medical providers — up from 1,000 on Wednesday — have voluntarily joined the city’s medical reserve to help treat patients infected with the coronavirus.