ALBANY COUNTY — Daniel McCoy, Albany County’s executive, said at his Sunday press briefing that, like other county leaders across New York State and government leaders in other states and around the world, he has no crystal ball to tell him how the coronavirus pandemic will play out.

He mentioned beaches being opened in Florida, which he termed “crazy,” and he mentioned the “social experiment” going on in Sweden, which he said has the “most amount of seniors dying.”

Sweden has asked its residents to observe social distancing but has kept its schools and its businesses like restaurants and bars open. On Sunday, Sweden reported 1,540 COVID-19 deaths — in relative terms, much more than the rest of Scandinavia but much less than in Spain, Italy, and the United Kingdom. A third of the Swedish deaths have been nursing-home residents.

“We’ll be judged months from now, maybe years from now,” said McCoy.

He went on, “I’d rather be judged saying I was too cautious and more worried about the health and safety of residents than anything else.

He concluded, “It’s a tough question.”

In Albany County, the number of confirmed cases of coronavirus disease 2019 continues to climb, with 651 reported on Sunday morning. Two more county residents died of the disease on Saturday, bringing the county’s death toll to 22.

One of the patients was a man in his sixties with multiple underlying health issues and the other was a man in his seventies. Most of the deaths in Albany County have been of elderly residents with underlying health issues.

McCoy also announced on Sunday that 797 county residents are under mandatory quarantine and 38 are under precautionary quarantine. A total of 1,555 people have completed quarantine, and 323 of them who had tested positive for the virus have recovered.

Thirty-two county residents are now hospitalized with seven of them in intensive-care units. The county’s hospitalization rate stands at 4.91 percent of those who have tested positive for the disease.

When the disease will peak, McCoy said, “depends on who you talk to.” He added, “Governor Cuomo and his team want to get it right.”

Andrew Cuomo at his press briefing on Sunday said, “The high point was a plateau and we got up to a high point and then we just stayed at that level for a while. If the data holds and if this trend holds, we are past the high point and all indications at this point that we are in a descent. Whether or not the descent continues depends on what we do, but right now we are on a descent.”

Cuomo also announced that the state’s health department will start on Monday to conduct a statewide antibody testing survey. The testing survey will sample 3,000 of the 19.5 million New Yorkers — for context, Cuomo said, Germany performed a 3,000-person sample with a population of 83 million.

Large-scale antibody testing will help determine the percentage of New Yorkers that are now immune to the virus, allowing more of them to safely return to work, the governor said.

Cuomo also said that New York will continue working with the federal government to assist with the supply chain and coordinate private labs to ramp up diagnostic testing, another key component of getting people back to work and restarting the economy.

Finally, he confirmed 6,054 additional coronavirus cases, bringing the total in New York to 242,786.

After a two-week hiatus, community diagnostic testing started again locally on April 6 with a state drive-through facility at the uptown University at Albany campus. This week, Albany County set up mobile test sites in high-risk neighborhoods in Albany and Watervliet that people can walk to.

McCoy said people need to be educated so they don’t have “false hope” if they test negative. “People think, ‘If I’m negative or I had it before, I’m OK to go out and do what I want to do,’” McCoy said.

Until the testing resumed, McCoy said, the county “didn’t have the scientific data” to inform the community about the outbreak in the county.

In announcing confirmed cases at daily briefings, McCoy gives just the number of cases not the location of the residents who were infected. “We wanted people to know it was all around us,” he said.

McCoy said that he hopes by Wednesday data will be posted on the county website.

He also said, “I know everybody’s getting cabin fever … People want to get back to the norm. The norm’s not here anymore.”