Live updates: White House predicts 20 percent unemployment; Sen. Lamar Alexander will self-quarantine

The New York City school district has reversed its ban on the use of Zoom for remote learning over security concerns after the company took measures to protect students, schools and other users, officials said. But hacking into school-related Zoom events continued in other places.

A virtual graduation ceremony at Oklahoma State University held Saturday on the Zoom platform was hacked by saboteurs who displayed racist and anti-Semitic messages, the school said. Another instance of what is known as “Zoombombing” was reported in Ohio, where a Brecksville-Broadview Heights School District Board of Education meeting was interrupted by a hacker who displayed child pornography on the screen for several seconds, the district said.

RIO DE JANEIRO — In Europe, parks are reopening, and people are taking back the streets. Australia has announced plans to jump-start tourism. Restrictions are easing in the United States.

But while much of the world is negotiating the terms of reopening, Brazil, which has registered nearly 11,000 dead and become the world’s latest coronavirus hot spot, still cannot find a way to properly shut down.

In hard-hit urban centers such as Rio de Janeiro, people still pack the streets. The boardwalks are still populated by beachgoers, including the elderly. Brazilian President Jair Bolsonaro is still downplaying the threat, declaring last week he would celebrate the weekend with a massive barbecue. Following pushback, he rode a water scooter instead.

Hair salons and small shops across France are reopening on Monday as the country begins to gradually return to normal after nearly eight weeks under one of Europe’s strictest lockdowns.

Since March 17, residents have only been allowed to leave home to report for jobs that are deemed essential, to buy crucial supplies, and to exercise. But as of Monday, they’ll be free to travel for any reason at all, so long as their trips remain under 100 kilometers (62 miles.) Gatherings of up to 10 people will be permitted, and kindergartens and primary schools will be allowed, but not required, to reopen.

France has the fifth-highest number of coronavirus deaths of any nation, and the death toll reached 26,383 on Sunday. But the number of daily deaths and people in intensive care has fallen sharply from the epidemic’s peak in mid-April. Many precautions are staying in place as the nation begins to ease restrictions: Bars and restaurants will remain closed, and wearing masks will be mandatory on public transportation.

Some have already begun to chafe at the new, less restrictive regulations. Last week, one member of parliament proposed a so-called “lovers’ amendment” that would allow couples who had been separated during the lockdown to be granted an exception to the 62-mile rule. But the country’s health minister was unmoved, saying that there already were enough loopholes.

PARIS — When residents of Europe’s major cities finally emerge from weeks of lockdowns later this month, they’ll be met with at least one enduring change from the pandemic: miles and miles of new bike lanes.

Officials across the continent, from Paris to Brussels to London to Milan, are scrambling to provide commuters with alternatives to the public buses and trains that millions once used for transportation each day but that don’t allow for social distancing.

Leaders and urban planners also see a unique opportunity to advance green policy goals. The result may fundamentally transform the European city.

Deborah Coughlin was neither short of breath nor coughing. In those first days after she became infected by the novel coronavirus, her fever never spiked above 100 degrees. It was vomiting and diarrhea that brought her to a Hartford, Conn., emergency room on May 1.

“You would have thought it was a stomach virus,” said her daughter, Catherina Coleman. “She was talking and walking and completely coherent.”

But even as Coughlin, 67, chatted with her daughters on her cellphone, the oxygen level in her blood dropped so low that most patients would be near death. She is on a ventilator and in critical condition at St. Francis Hospital, one more patient with a strange constellation of symptoms that physicians are racing to recognize, explain and treat.

Two of President Trump’s top economic advisers projected Sunday that unemployment will climb as the coronavirus pandemic continues its sweep across the United States, with one official predicting that the unemployment rate will jump to 20 percent by next month.

The statements from White House economic adviser Kevin Hassett and Treasury Secretary Steven Mnuchin came three days after the Labor Department reported its highest unemployment figures since the Great Depression, and as the U.S. death toll from the coronavirus surpassed 79,000.

They also came as a Senate panel announced that four administration officials who had been set to testify in person on the pandemic this week will instead do so via videoconference because of their proximity to two White House staff members who recently tested positive. One of those staffers is an aide to Vice President Pence, but a spokesman said Sunday that Pence plans to be at the White House on Monday.