Alessandra Said, 45, a doctor at Emergency Rescue Service (SAMU) embraces her mother Maria da Consolacao Said, 77, who recently recovered from the coronavirus disease (COVID-19), after monitoring her in Manaus, Brazil May 12, 2020.

National Institute of Allergy and Infectious Diseases Director Dr. Anthony Fauci looks down as U.S. President Donald Trump speaks about administration efforts to develop a coronavirus disease (COVID-19) vaccine in the Rose Garden at the White House in Washington, U.S., May 15, 2020.

A graduate from California State University San Marcos celebrates while participating in a car parade through campus during the outbreak of the coronavirus disease (COVID-19) in San Marcos, California, U.S., May 15, 2020.

A graduate from California State University San Marcos celebrates during a car parade through campus during the outbreak of the coronavirus disease (COVID-19) in San Marcos, California, U.S., May 15, 2020.

A woman wearing a face mask looks on in front of others standing in a queue for nucleic acid testings in Wuhan, the Chinese city hit hardest by the coronavirus disease (COVID-19) outbreak, Hubei province, China May 16, 2020.

A specialist sprays disinfectant while sanitizing a bridge amid the outbreak of the coronavirus disease (COVID-19) in Moscow, Russia May 16, 2020.

A man disinfects a sunbed during the official reopening of beaches to the public following the easing of measures against the spread of the coronavirus disease (COVID-19), in Athens, Greece, May 16, 2020.

A migrant worker covers her child with a sari to protect him from heat as she waits in a queue for transport to reach to a railway station to board a train to her home state of northern Uttar Pradesh, after a limited reopening of India's giant rail network following a nearly seven-week lockdown to slow the spreading of the coronavirus disease (COVID-19), in Ahmedabad, India, May 16, 2020.

A child reacts while undergoing nucleic acid testing in Wuhan, the Chinese city hit hardest by the coronavirus disease (COVID-19) outbreak, Hubei province, China May 16, 2020.

Police officers detain an anti-lockdown protester during a demonstration in Hyde Park, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 16, 2020.

People queue to receive donated food from volunteers of Vecinos Parque Aluche association as the spread of the coronavirus disease (COVID-19) continues in Madrid, Spain, May 16, 2020.

People wearing face masks walk at Trocadero square near the Eiffel Tower, as France began a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19) in Paris, France, May 16, 2020.

Soccer Football - Bundesliga - Borussia Dortmund v Schalke 04 - Signal Iduna Park, Dortmund, Germany - May 16, 2020 Dortmund's Erling Braut Haaland celebrates scoring their first goal as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) Martin Meissner/Pool via REUTERS

Guests smile as they ride a water slide at Golfland Sunsplash water park after the coronavirus disease (COVID-19) restrictions were eased in Mesa, Arizona, U.S. May 15, 2020.

Ysmail Perez, 16, shows the scar on his head caused by a projectile fired by the riot police, ESMAD, during an eviction operation, amid the coronavirus disease (COVID-19) outbreak in Bogota, Colombia May 15, 2020.

A member of the Serpentine swimming club poses with an umbrella he found in the Serpentine Lake in Hyde Park prior to it's official reopening on Monday, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 16, 2020.

People walk on rocks to cross the River Dove in Dovedale in the Peak District, following the outbreak of the coronavirus disease (COVID-19), Ashbourne, Britain, May 16, 2020.

Soccer Football - Bundesliga - Fortuna Dusseldorf v SC Paderborn - Merkur Spiel-Arena, Dusseldorf, Germany - May 16, 2020 General view before the match, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) Carsten Lappe/Pool via REUTERS

Police officers detain a demonstrator whose copy of the Constitution of Poland lays crumpled on the ground, during an anti-government protest, amid the spread of the coronavirus disease (COVID-19) in Warsaw, Poland May 16, 2020.

A protester is detained by police officers during a demonstration in Hyde Park, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 16, 2020.

A man wearing a protective face mask and a Spanish flag marches and bangs saucepan lids as he attends a protest against the Spanish government's handling of the coronavirus crisis in Madrid, Spain May 16, 2020.

Children of migrant workers wearing protective face masks wait to cross the border to their home state of Uttar Pradesh, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 16, 2020.

People queue during a food distribution during the outbreak of the coronavirus disease (COVID-19) in the Corona section of Queens, New York City, New York, U.S., May 16, 2020

New York City Mayor Bill De Blasio wears a face mask as he speaks to people before giving away face masks for using on public spaces to prevent the spread of coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 16, 2020.

A woman wearing a protective suit talks to a child at a migrant neighbourhood during the start of a general quarantine to force down a surging rate of fresh coronavirus cases in the capital, amid the spread of the coronavirus disease (COVID-19) in Santiago, Chile May 16, 2020.

A young girl wears a bandana covering with a symbol of the Three Percent Militia on it at a protest against restrictions implemented in response to the coronavirus disease (COVID-19) outbreak near Massachusetts Governor Charlie Baker’s house in Swampscott, Massachusetts, U.S., May 16, 2020.

A woman wears a mask reading "Fascist Muzzle" at a protest against restrictions implemented in response to the coronavirus disease (COVID-19) outbreak near Massachusetts Governor Charlie Baker’s house in Swampscott, Massachusetts, U.S., May 16, 2020.

Crematory workers using protective gear are pictured at a crematory in Nezahualcoyotl during the outbreak of the coronavirus disease (COVID-19), on the outskirts of Mexico City, Mexico May 16, 2020.

A New York Police Department officer keeps an eye on people as they control social distance on a warm day during the outbreak of the coronavirus disease (COVID-19) at Domino Park in Brooklyn, New York, U.S., May 16, 2020.

Torrey Pines High School graduating student Phoebe Seip (18, center), and her sisters Sydney (22, left) and Paisley, 6, watch former U.S. President Barack Obama deliver a virtual commencement address to millions of high school seniors who will miss graduation ceremonies due to the coronavirus disease (COVID-19) outbreak, while celebrating Phoebe's canceled prom night at home in San Diego, California, U.S., May 16, 2020.

Shi'ite worshippers place copies of the Koran on their heads during the holy month of Ramadan at Imam Ali Shrine, following the outbreak of the coronavirus disease (COVID-19), in the holy city of Najaf, Iraq May 16, 2020. REUTERS / Alaa Al-Marjani

A graduating Masters student from the Columbia University Graduate School of Architecture, Planning and Preservation (GSAPP) stands on campus the day before his graduation ceremony, which is to be held online due to the outbreak of the coronavirus disease (COVID-19) in Manhattan, New York City, U.S., May 15, 2020. Image used for illustrative purpose.

A woman prays during a Roman Catholic service held outside of a food bank at St. Bartholomew Church, during the outbreak of the coronavirus disease (COVID-19) in the Elmhurst section of Queens, New York City, New York, U.S., May 15, 2020.

Torrey Pines High School graduating student Phoebe Seip, 18, crowns herself while celebrating her canceled prom night at home during the coronavirus disease (COVID-19) outbreak in San Diego, California, U.S., May 16, 2020.

An Orthodox faithful receives the sacraments during the first service open for believers following the easing of measures against the spread of the coronavirus disease (COVID-19), in Athens, Greece, May 17, 2020.

Residents wearing face masks line up for nucleic acid testings at a residential compound in Wuhan, the Chinese city hit hardest by the coronavirus disease (COVID-19) outbreak, Hubei province, China May 17, 2020.

A man reacts, next to a Polish flag laying on the ground, after being sprayed with tear gas, during an anti-government protest, amid the spread of the coronavirus disease (COVID-19) in Warsaw, Poland May 16, 2020.

Neonatal Nurse Kirsty Hartley carries premature baby Theo Anderson to his mother Kirsty Anderson in the Neonatal Intensive Care Unit at the Lancashire Women and Newborn Centre at Burnley General Hospital in East Lancashire, following the outbreak of the coronavirus disease (COVID-19), in Burnley, Britain May 15, 2020. Picture taken May 15, 2020.

A Radiologist comforts patient Doreen Mount before having an X-ray in the X-ray department at The Royal Blackburn Teaching Hospital in East Lancashire, following the outbreak of the coronavirus disease (COVID-19), in Blackburn, Britain, May 14, 2020.

A member of the Serpentine swimming club trains near a swan in the Serpentine Lake in Hyde Park during a test session prior to its official reopening on Monday, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 17, 2020.

Jordanian brothers Hussein and Zeyad Ashish, boxers who qualified with other three boxers to next year's Olympics, engage in an online boxing training on the roof of their home during the curfew imposed by the Jordanian government to curb the spread of the coronavirus disease (COVID-19) at Al-Baqaa Palestinian refugee camp, near Amman, Jordan, May 14, 2020.