Boys play together while wearing face masks to protect against coronavirus infection, in St.Petersburg, Russia, Thursday, June 11, 2020. (AP Photo/Dmitri Lovetsky)

Women take a selfie at a park in Seoul, South Korea, Thursday, June 11, 2020. Just weeks ago South Korea was celebrating its hard-won gains against the coronavirus. It was easing social distancing measures, reopening schools and promoting its tech-driven methods of fighting the spread of the virus. But the country’s success story is being threatened by a resurgence of infections in the area around Seoul where half of South Korea’s 51 million people live. (AP Photo/Ahn Young-joon)

A couple wearing matching t-shirts and masks to curb the spread of the coronavirus walks along the street of Beijing on Thursday, June 11, 2020. (AP Photo/Ng Han Guan)

Activists in costume dig symbolic graves on Copacabana beach as a protest, organized by the NGO Rio de Paz, against the government's handling of the COVID-19 pandemic in Rio de Janeiro, Brazil, Thursday, June 11, 2020. A Brazilian Supreme Court justice ordered the government of President Jair Bolsonaro to resume publication of full COVID-19 data, including the cumulative death toll, following allegations the government was trying to hide the severity of the pandemic in Latin America’s biggest country. (AP Photo/Leo Correa)

A Puerto Rican flag flies on an empty beach at Ocean Park, in San Juan, Puerto Rico, Thursday, May 21, 2020. Puerto Rico is cautiously reopening beaches, restaurants, churches, malls, and hair salons under strict conditions as the U.S. territory emerges from a two-month lockdown despite dozens of new coronavirus cases reported daily. (AP Photo/Carlos Giusti) PUERTO RICO OUT-NO PUBLICAR EN PUERTO RICO

In this Feb. 27, 2020 photo, Ohio Department of Health Director Amy Acton holds up a mask as she gives an update on the state's preparedness and education efforts to limit the potential spread of COVID-19 at MetroHealth Medical Centre in Cleveland. Dr. Acton has resigned as Ohio's health director, Gov. Mike DeWine said Thursday, June 11, 2020, capping a contentious few months as the target of frustrations during the coronavirus pandemic that included gun-carrying critics showing up at her home. AP Photo/Tony Dejak)

Members of the Class of 2020, all wearing face masks, file into a stadium at Yuma Catholic High School for the graduation ceremony Wednesday, June 10, 2020, in Yuma, Ariz., during the coronavirus pandemic. (Randy Hoeft/The Yuma Sun via AP)

People wearing face masks to protect against coronavirus walk through the subway, with a portrait of Soviet founder Vladimir Lenin in the background, in Moscow, Russia, Wednesday, June 10, 2020. Moscow residents are no longer required to stay at home or obtain electronic passes for traveling around the city. All restrictions on taking walks, using public transportation or driving have been lifted as well. (AP Photo/Pavel Golovkin)

The child of a migrant worker waits with family members to have their temperatures checked before being allowed to board a train tomorrow for their hometowns, in Jammu, India, Thursday, June 11, 2020. Two and a half months of nationwide lockdown kept numbers of infections relatively low in India. But with restrictions easing in recent weeks, cases have shot up with India's tally becoming the fifth highest in the world, raising questions about whether authorities have done enough to avert catastrophe. (AP Photo/Channi Anand)

FILE - In this May 27, 2020, file photo, visitors to the River Walk pass a restaurant that has reopened in San Antonio. Coronavirus cases are rising in nearly half the U.S. states, as states are rolling back lockdowns. (AP Photo/Eric Gay, File)

People walk through a downtown shopping district in Sao Paulo, Brazil, Wednesday, June 10, 2020. Retail shops reopened on Wednesday in Brazil's biggest city after a two-month coronavirus pandemic shutdown that aimed to contain the spread of the new coronavirus. (AP Photo/Andre Penner)

A woman plays an electronic slot machine at at the reopening of the Bellagio hotel and casino Thursday, June 4, 2020, in Las Vegas. Casinos in Nevada were allowed to reopen on Thursday for the first time after temporary closures as a precaution against the coronavirus. (AP Photo/John Locher)

A man wearing a mask as a precaution against the spread of the new coronavirus, and a Barcelona soccer club jersey walks with a package of eggs down the street in Havana, Cuba, Thursday, June 11, 2020. Cuban authorities are requiring the use of masks for anyone outside their homes. (AP Photo/Ramon Espinosa)

Italian Technological Innovation and Digitalization Minister, Paola Pisano shows her phone, featuring a contact tracing app that Italy launched nationwide in its efforts to contain COVID-19’s spread, during an interview with The Associated Press in Rome, Thursday, June 11, 2020. Pisano told The AP that so far 2 million people have downloaded the Immuni app, that uses Bluetooth technology to notify users they have come into close, prolonged contact with an app user who has tested positive to the new coronavirus. (AP Photo/Domenico Stinellis)

FILE - In this May 19, 2020, file photo, Kaiden Melton, 12, has her temperature taken during a daycare summer camp at Legendary Blackbelt Academy in Richardson, Texas. Coronavirus cases are rising in nearly half the U.S. states, as states are rolling back lockdowns. (AP Photo/LM Otero, File)

In this Saturday, May 23, 2020 photo, hundreds of race fans wait in line to purchase tickets at the Ace Speedway on in the rural Alamance County community of Altamahaw near Elon, N.C. North Carolina Gov. Roy Cooper’s administration has ordered closed a small stock-car track that’s allowed large crowds to gather repeatedly for weekend races well above COVID-19 limits for mass gatherings. Cooper’s health secretary says Ace Speedway in Alamance County is an “imminent hazard” for the virus' spread and can't reopen unless it creates a safety plan to keep fans away. (Robert Willett/The News & Observer via AP)

FILE - In this Wednesday, June 10, 2020 file photo, Red Star fans watching a Serbian National Cup semifinal soccer match between Partizan and Red Star in Belgrade, Serbia. Serbia's president Aleksandar Vucic has cancelled his party's pre-election rallies and officials in Bosnia, Macedonia and Albania are appealing on citizens to respect protection measures after relaxation of rules against the new coronavirus led to a recent spike in cases in the Balkan countries. (AP Photo/Darko Vojinovic, File)

Family members add the name of Genevieve Burnett to a memorial Wall with the words "We Grieve" where the names of local people who have died from COVID-19 and other non-coronavirus related illnesses during the coronavirus outbreak are written on hoarding around Liberty Hall on Clapton Common, in London, Thursday June 11, 2020. (Aaron Chown/PA via AP)

An Indian doctor conducts a swab test of a journalist during lockdown to control the spread of the new coronavirus in Mumbai, India, Thursday, April 16, 2020. Indian Prime Minister Narendra Modi on Tuesday extended the world's largest coronavirus lockdown to head off the epidemic's peak, with officials racing to make up for lost time. (AP Photo/Rafiq Maqbool)

In this Friday, March 13, 2020, photo, a tourist wearing protective mask walk in front of giant Buddha at Wat Pho temple in Bangkok, Thailand. Wat Pho, which is one of Thailand's major tourist attractions and famous for housing the golden 46-meter- (151-foot-) long Reclining Buddha, has barred entry to foreigners, professing fear that they could spread COVID-19. (AP Photo/Sakchai Lalit)

Russian soldiers, a guard team wearing face masks to protect against coronavirus infection walk from their barracks to a military headquarters in St.Petersburg, Russia, Thursday, June 11, 2020. (AP Photo/Dmitri Lovetsky)

A woman wears a face mask as a precaution against the new coronavirus outbreak as she receives free staple food packages provided by the government for low-income residents in Jakarta, Indonesia, Thursday, June 11, 2020. (AP Photo/Achmad Ibrahim)

A worker sanitizes products in a shop at a mall in Jammu, India, Thursday, June 11, 2020. Two and a half months of nationwide lockdown kept numbers of infections relatively low in India. But with restrictions easing in recent weeks, cases have shot up with India's tally becoming the fifth highest in the world, raising questions about whether authorities have done enough to avert catastrophe. (AP Photo/Channi Anand)

A view of the relaunch ceremony of the famous fountain 'Le Jet d'Eau', which was postponed due to the coronavirus outbreak, in Geneva, Switzerland, Thursday, June 11, 2020. (Martial Trezzini/Keystone via AP)