is beginning to test for antibodies that would show previous coronavirus infections.President Trump warns that there will be “a lot of death” in the coming week.ImageMedical personnel transferring bodies to a temporary morgue at Wyckoff Heights Medical Center in Brooklyn on Saturday.

New York hospitals have needed to expand their capacity as coronavirus cases overwhelm them.Credit...Victor J.

Blue for The New York TimesPresident Trump on Saturday sought to brace the nation for a surging death toll from the coronavirus pandemic, warning that the country could be entering “the toughest week.”.

Trump said at the White House, where he and other American officials depicted some parts of the United States as climbing toward the peaks of their crises, while warning that new hot spots were emerging in Pennsylvania, Colorado and Washington, D.C.

More than 8,000 people have died so far in the United States, but the White House has said its projections show that at least 100,000 people could die because of the virus.

Birx also said that Detroit, New York and Louisiana — the current hot spots — will likely reach a peak in the next six to seven days, citing the Institute for Health Metrics and Evaluation’s predictions.

President Trump appeared to suggest on Saturday that the federal government was placing large amounts of the anti-malarial drug hydroxycholoroquine medication in its Strategic National Stockpile, speaking optimistically about its potential to treat coronavirus patients and saying he would consider taking it himself if needed.

Trump said?

The United States on Saturday experienced its first full day under a federal recommendation that people wear cloth masks when they go out in public in many instances, the latest effort to contain the coronavirus pandemic that has seen more than 1 million people worldwide become infected.

But health experts have also feared that people would don masks only to loosen their compliance with social distancing guidelines.

More than 300,000 people in the United States have tested positive for the virus, and officials believe that the number of people who have been infected is far higher.

More than 8,000 people have died, including at least 3,565 in New York, the hardest hit state.

Globally, cases passed 1.1 million and deaths passed 59,000.

The recommendation for masks in the United States followed an intense West Wing debate over several days as a divided Trump administration wrestled with whether to request such a drastic change in Americans’ social behavior.

Cuomo warned Saturday that, as infections passed 113,700 and deaths 3,500, New York State would reach the worst point of the coronavirus crisis within a week or so.

He also said that 85,000 people had volunteered to help New York fight the coronavirus and that 22,000 of them were from out of state, and that the Chinese government was facilitating a donation of 1,000 ventilators to New York and Oregon was sending 140 as the state rushes to increase its supply.

Cuomo and Mayor Bill de Blasio of New York have cited shortages of hospital equipment, something President Trump seemed to allude to in attacking the news media at a White House Briefing on Saturday.

Trump said of unnamed media outlets.

Trump said many hospital administrators had reported that their supply levels “are meeting their essential needs,” adding that they are “really thrilled to be where they are.”.

de Blasio said the city was heading into “the toughest time,” and repeated his calls for a national enlistment system to help move doctors and health care workers around the country to areas with high need.

The Wisconsin primary is still scheduled for Tuesday despite a lack of plans on how to keep voters safe.The tumult around Wisconsin’s upcoming primary election continued on Saturday, as Republican lawmakers in the state legislature refused to take up measures supported by the Democratic governor that would delay the state’s election amid public health concerns caused by the coronavirus outbreak.

Senator Bernie Sanders has called for the election to be delayed, and many local leaders said they did not have enough poll workers to adequately staff sites.

In Milwaukee, the state’s most populous city, there are typically more than 150 polling locations, but election workers said they would have only five.

Trump backs the Navy’s firing of a captain who sounded the alarm about an outbreak on his carrier.President Trump on Saturday lashed out at the Navy captain who was dismissed after he wrote a letter to his commanders and sought more help as the coronavirus spread through his ship.

Trump said of Capt.

But some Navy officials complained that the letter had stirred panic, both on the ship and ashore, and said that his approach to airing his concerns prompted them to lose confidence in his ability to command the Roosevelt.

Trump said he supported the Pentagon’s decision to remove the captain.

is beginning to test for antibodies that would show previous coronavirus infections.The Centers for Disease Control and Prevention has begun to conduct tests to find out whether people have been previously infected with the coronavirus, officials said Saturday.

Joe Bresee, deputy incident manager of the agency’s Covid-19 response, testing will focus on three groups: people in areas with a high concentration of cases; people in a representative sample of other areas from around the country; and special groups of people who are likely to have had a higher risk of exposure, like health care workers.

And while some countries, like Italy and Britain, have raised the possibility of giving people with antibodies permits to allow them to return to the work force, officials with the C.D.C.

also said on Saturday that it had expanded the coronavirus information it publishes online, adding a weekly report that will include figures on outpatient and emergency department visits, hospitalizations, deaths and data on testing for the virus.

Kemp, who had been among the governors resisting more stringent measures, called it an effort to buy critical time as the state braced for a surge in cases of the coronavirus.

“No one wants to walk on the beach more than I,” Shirley Sessions, the mayor of Tybee Island, a beach community of about 3,000 people just below the South Carolina State line, said in a letter to Mr.

State officials said that the rules call for social distancing and discourage beachgoers to linger.

since Trump imposed travel restrictions.At least 430,000 people have arrived in the United States on direct flights from China since that country disclosed the existence of a pneumonialike illness to international health experts on New Year’s Eve, according to an analysis of data collected in both countries.

But the analysis of the flight and other data by The New York Times shows the travel measures, however effective, may have come too late, particularly in light of recent statements from officials that as many as 25 percent of infected people may never have symptoms.

An outbreak at a cancer hospital shocks Egypt, as the global caseload rises past 1.1 million.At least 17 Egyptian doctors and nurses have tested positive for the coronavirus, the National Cancer Institute in Cairo said on Saturday, raising fears the pandemic could have a devastating effect on health facilities in the Arab world’s most populous country.

The outbreak was the first reported among medical workers in Egypt, which recorded an increase in the rate of infections over the weekend: The health ministry recorded 120 cases on Friday, raising the total to 985, with 66 deaths.

Cairo University, which runs the cancer hospital, said in a statement that all medical workers at the facility were being tested, and that the hospital would be closed and sanitized.

The Egyptian medical syndicate, an association representing hundreds of thousands of medical workers, said in a statement that it was “shocked” by the number of cases and urged the authorities to supply protection equipment and apply strict testing protocols.

It said in a post on Facebook that the infected medical workers had been placed in quarantine.

The coronavirus pandemic has sickened more than 1.1 million people, according to official counts.

As of Saturday morning, at least 59,000 people have died, and the virus has been detected in at least 175 countries.

Spain said that 809 coronavirus patients, including a 5-year-old, had died overnight.

Also on Saturday, Prime Minister Pedro Sánchez said that the nationwide lockdown would be extended another 15 days.

France: Officials reported 68,605 test-confirmed cases of Covid-19 around the country and 7,560 deaths, as well as 6,838 patients in intensive care.

Ecuador: The health minister said there was a “sharp rise” in coronavirus deaths on Friday in Guayaquil, the center of the country’s outbreak, with the toll rising to 1,500 from 700.

The government has said it is building a “special camp” for coronavirus patients in Guayaquil, where residents are under strict quarantine and curfew measures, leaving police officers and soldiers to collect the bodies of the dead from homes — as many as 150 a day — and have been tasked with burying the dead.

Medical officials said she had other underlying conditions.

Georgia, a nation of 3.7 million people, reported a total of 157 confirmed cases.

Germany: The country has identified 91,000 coronavirus infections, more reported cases than all but the United States, Spain and Italy.

Coronavirus Map: Tracking the Global OutbreakThe virus has infected more than 1.1 million people in at least 175 countries.

A provocative idea in Italy: Blood tests to decide who goes back to work.The weeks of locking down Italy, which has had the world’s deadliest coronavirus outbreak, may be starting to pay off, as officials announced this week that the numbers of new infections had plateaued and, on Saturday, that ICU cases had gone for the first time.

To do so, Italian health officials and some politicians have focused on an idea that might once have been relegated to the realm of dystopian novels and science fiction films.

Unusual vaccine is ready for human trials, scientists say.An experimental vaccine is ready to test in people as soon as the Food and Drug Administration grants permission, researchers at the University of Pittsburgh Medical Center said.

invokes law to force 3M’s hand on surgical masks.The Trump administration is using a Korean War-era law to redirect to the United States surgical masks manufactured by 3M in other countries as part of a heated pressure campaign to force the Minnesota company to cut off sales of surgical masks abroad.

The Trump administration’s new executive order directs federal emergency management and health officials to use the law’s authority to preserve respirators, surgical masks and surgical gloves for domestic use.

With slumping revenue, clinics that treat the poor are facing layoffs.Since the 1960s War on Poverty, a network of community health clinics around the nation have served as a health care refuge for people with no health insurance and few financial resources.

Around the country, nonprofit community health centers provide primary care to about 29 million people regardless of their ability to pay.

“I worry a lot,” said Chuck Jones, the chief executive of the Boston-area clinics, Harbor Health Services, “that if community health centers go away, we won’t as a society hear the struggles of these people.”.

Our reporters looked back at how the 1918 flu claimed lives, overwhelmed health care workers and morticians, and prompted ordinary people to rise to the moment in the fight against an invisible foe.

By the end of last week, coronavirus cases in Philadelphia had reached 2,430, with 26 deaths.