Newsday is opening this story to all readers so Long Islanders have access to important information about the coronavirus outbreak. All readers can learn the latest news at newsday.com/LiveUpdates. This story was reported by John Asbury, Jim Baumbach, Matthew Chayes, David Olson, David Reich-Hale, J.P. Salamanca and Craig Schneider. It was written by Schneider.

Gov. Andrew M. Cuomo said Saturday the state continues to flatten the curve of new coronavirus cases, but he clashed with New York City Mayor Bill de Blasio over the mayor's decision to keep schools closed through the end of the academic year.

Cuomo said that 783 additional New Yorkers have died of COVID-19, bringing the total to 8,627.

The state's daily death toll has been above 700 for the last five days, including a record 799 reported Thursday.

"You can see that the number is somewhat stabilizing, but it is stabilizing at a horrific rate,” Cuomo said. “These are just incredible numbers depicting incredible loss and pain.”

The state reported 9,946 new positive cases of COVID-19, bringing the total to 180,458. That one-day hike is slightly less than the previous day's increase of 10,575.

The numbers on Long Island remained grim.

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Roughly 1,658 people in Suffolk County were hospitalized with the virus as of Saturday, according to the latest figures. County Executive Steve Bellone reported 44 more deaths in the past 24 hours, bringing the county total to 458.

Nassau County Executive Laura Curran reported an increase of 1,072 new positive cases in that county, totaling 22,584 since March 5. Curran reported 69 new deaths, bringing the county total to 792.

Also Saturday, Mount Sinai South Nassau hospital in Oceanside announced that two per-diem employees and a Freeport doctor with attending privileges at the hospital have died after battling COVID-19.

Across the United States, the death toll from the virus eclipsed Italy's for the highest in the world, surpassing 20,000. The death rate — that is, the number of dead relative to the population — is still far higher in Italy than in the United States, which has more than five times as many people.

About half the U.S. deaths are in the New York metropolitan area.

At odds over schools

Meanwhile, Cuomo said the state may close schools through June, but he pushed back on de Blasio's announcement Saturday that city schools would remain closed through the end of the academic year, saying such a decision would have to be made in coordination with the entire metropolitan area.

"There has been no decision. That's the mayor's opinion," Cuomo said in his Saturday briefing.

Earlier Saturday, de Blasio said the closure of the 1.1 million-student system would be extended amid the ongoing pandemic. "There is nothing easy about this decision. … It clearly will help us save lives," he said.

But Cuomo said any decision to close or open schools would be coordinated among New York City officials, with input from officials in Nassau, Suffolk and Westchester. He added that ideally the decision would be statewide and include New Jersey and Connecticut — and that it would not be made in the next few days.

The governor said he “values” de Blasio's opinion but said it's his own legal authority to close the schools. “The worst thing that can happen is to make a misstep, and let our emotions get the best of our logic,” Cuomo said.

He said the decision about reopening schools should be done in coordination with the decision to reopen businesses.

Earlier in March, Cuomo did not stop Long Island school districts from closing before New York City's. Among districts that had done so were those in Jericho and Sag Harbor.

After Cuomo's briefing Saturday, de Blasio's representative responded.

"The governor's reaction to us keeping schools closed is reminiscent of how he reacted when the mayor called for a shelter in place," de Blasio press secretary Freddi Goldstein said. "We were right then and we're right now."

In March, the week before Cuomo issued a stay-at-home order, de Blasio had suggested essentially the same thing, but Cuomo dismissed the idea, only to impose it several days later, calling it "PAUSE."

Places that implemented such measures earlier, such as California, have had far fewer infections and death tolls.

Interviewed Saturday evening on activist Al Sharpton's MSNBC talk show, de Blasio said he must do what's best for the city and the school system that he said he controlled by law.

"My responsibility is to those kids, those parents, those educators, who need to be safe, and my responsibility is to protect my people," he said.

De Blasio is planning to reopen schools in September. “We’re going to be playing a lot of catch-up,” he said.

Curran said Saturday she fully supports Cuomo’s regional approach to reopen schools. “We are not an island unto ourselves. We have to do this in a way that is regional, methodical and well thought-out," Curran said.

Bellone said he too agreed with the governor that the decision should be made on a regional basis.

Some good news

In a bit of good news, Suffolk County had another 160 people sent home from hospitals in the last 24 hours, Bellone said.

“That’s the highest we have seen and it’s a measure of where we are going,” he said. “By no means should it suggest that we should change course in any way, but we should look at the numbers realistically and say that is a very positive sign."

Suffolk County has seen a decrease of COVID-19 patients in intensive-care unit beds for the week, although the county still has 771 patients who tested positive for the virus in ICU beds, he said.

Bellone pointed out that last week, the county was averaging 144 new patients daily testing positive for the virus. This week, that number has dropped to 35 daily.

On the testing front, Bellone announced Saturday that new “hot spot" testing sites will be opening in Wyandanch and North Amityville this week, with more details to follow.

The county opened new testing sites Friday in Riverhead, Huntington Station and Brentwood. The sites are targeting communities with large minority populations and large numbers of cases.

In Nassau County, meanwhile, there are 481 patients on ventilators as of Saturday, an increase of four.

Countywide, Nassau reported 138 police officers and personnel who have tested positive, including the county, village and city police departments. The county has 161 police personnel in quarantine and cleared 170 officers from quarantine, Curran said.

The Nassau County Sheriff’s Department reported 51 positive cases and 77 in quarantine, with 47 officers cleared and back to work.

There have been 19 Nassau County inmates who have tested positive with five inmates pending results and 16 inmates cleared from quarantine.

Pushing SALT repeal

Cuomo on Saturday also advocated for the repeal of SALT, the federal initiative that placed a $10,000 cap on federal tax deductions for state and local property and income taxes.

“It was a gratuitous, offensive, illegal action, I believe, to begin with,” he said.

Cuomo said it would be impossible for the country to recover from the pandemic without the strong economic engine of the New York metropolitan region, and he hoped the next federal stimulus bill is “less political, less pork barrel.”

He also praised President Donald Trump’s response to the coronavirus pandemic in New York. “I’ve worked hand-in-glove with the president,” he said. “He has really responded to New York’s needs."

Some hospitals fully stressed

In Oceanside, Mount Sinai South Nassau hospital announced the deaths of the two per-diem employees and the doctor.

Dr. Jesus M. Zambrano, 54, a pediatrician in Freeport and a Brooklyn resident, died March 29, the hospital said.

Ferdinando Moretti, 73, a hospital painting crew foreman who retired in 2014 after 31 years at the hospital and returned in 2015 as a per diem employee, died on April 4.

Mario Salonga, 59, a per-diem physical therapist at South Nassau who also worked for the Visiting Nurse Service, also died recently.

Richard J. Murphy, the hospital’s president and CEO, sent a memo to hospital staff that said the three “exemplify what makes every Mount Sinai South Nassau employee and medical staff member special, the willingness to be present during a time of unprecedented crisis with a special commitment to the patients we serve.”

Northwell Health said on Saturday it has 3,311 COVID-19 patients at its 19 hospitals, which include 11 on Long Island. The largest health system in the state has reported between 3,300 and 3,400 patients all week.

Northwell has called Queens, western Nassau County and Brentwood hot spots all week.

Also Saturday, the New York State Nurses Association requested that the state release its stockpiles of PPE to the facilities that are most in need. If there are no stockpiled supplies remaining, the union urged the state "to take all necessary measures" to address the shortage.

Meanwhile, Congressman Lee Zeldin (R-Shirley) secured a donation that arrived Saturday of 10,000 KN95 masks for Suffolk County from the Stephen Siller Tunnel To Towers Foundation.