Office workers wearing face masks take their lunch break at the central business district amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Office workers wearing face masks take their lunch break at the central business district amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Office workers wearing face masks take their lunch break at the central business district amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

A National Guard soldier wears a mask while assisting police as protesters march against the death in Minneapolis police custody of George Floyd, in Philadelphia, Pennsylvania June 1, 2020. REUTERS/Bastiaan Slabbers

Children wearing protective face masks sanitise their hands as they attend preschool classes at St James' Church Kindergarten as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Children wearing protective face masks and shields attend preschool classes at St James' Church Kindergarten as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Children wearing protective face masks sanitise their hands as they attend preschool classes at St James' Church Kindergarten as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Hong Kong Chief Executive Carrie Lam, wearing a mask due to the ongoing global outbreak of the coronavirus (COVID-19), speaks during a news conference over the new national security legislation in Hong Kong, China June 2, 2020. REUTERS/Tyrone Siu

Hong Kong Chief Executive Carrie Lam, wearing a mask due to the ongoing global outbreak of the coronavirus (COVID-19), speaks during a news conference over the new national security legislation in Hong Kong, China June 2, 2020. REUTERS/Tyrone Siu

Hong Kong Chief Executive Carrie Lam, wearing a mask due to the ongoing global outbreak of the coronavirus (COVID-19), speaks during a news conference over the new national security legislation in Hong Kong, China June 2, 2020. REUTERS/Tyrone Siu

Hong Kong Chief Executive Carrie Lam, wearing a mask due to the ongoing global outbreak of the coronavirus (COVID-19), speaks during a news conference over the new national security legislation in Hong Kong, China June 2, 2020. REUTERS/Tyrone Siu

Hong Kong Chief Executive Carrie Lam, wearing a mask due to the ongoing global outbreak of the coronavirus (COVID-19), speaks during a news conference over the new national security legislation in Hong Kong, China June 2, 2020. REUTERS/Tyrone Siu

Detroit police, wearing riot gear, line up next to an armored vehicle in preparation to enforce a curfew following a rally against the death in Minneapolis police custody of George Floyd, in Detroit, Michigan, U.S. June 1, 2020. REUTERS/Rebecca Cook

A man wearing an American- Mexican flag walks by Seattle Police officers as protesters rally against the death in Minneapolis police custody of George Floyd, in Seattle, Washington, U.S. June 1, 2020. REUTERS/Lindsey Wasson

A woman wearing a protective face mask cries during a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A worker wearing a face mask following the coronavirus disease (COVID-19) outbreak cleans the floor near a Polestar 2 electric sedan displayed at a shopping mall in Shanghai, China May 5, 2020. Picture taken May 5, 2020. REUTERS/Yilei Sun

People wearing protective face masks hold candles during a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A man wearing a protective face mask attends a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A woman wearing a protective face mask cries during a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A man wearing a protective face mask holds a candle during a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

People wearing protective face masks hold candles during a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A man wearing a protective face mask gestures during a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A man wearing a protective face mask attends a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid TPX IMAGES OF THE DAY

People wearing protective face masks hold candles during a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A woman wearing a protective face mask holds a sign during a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

People wearing protective face masks attend a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A man wearing a protective face mask attends a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

People wearing protective face masks attend a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

A man wearing a protective face mask gestures as he attends a rally and candle light vigil against the death in Minneapolis police custody of George Floyd, at Queens Park in the Queens borough of New York City, U.S., June 1, 2020. REUTERS/Brendan McDermid

Lakisha Hayes, wearing a "Can’t Breathe" mask, kneels during nine minutes of prayer led by faith leaders with the group Prophetic Resistance Boston remembering the death in Minneapolis police custody of George Floyd, in Boston, Massachusetts, U.S., June 1, 2020. REUTERS/Brian Snyder

Students wearing protective face masks read in class at Yio Chu Kang Secondary School, as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Students wearing face masks sing the national anthem in class at Yio Chu Kang Secondary School, as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Students wearing protective face masks listen in class at Yio Chu Kang Secondary School, as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Students wearing protective face masks read in class at Yio Chu Kang Secondary School, as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

A student wearing a protective face mask reads in class at Yio Chu Kang Secondary School, as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Students wearing face masks stand for the national anthem in class at Yio Chu Kang Secondary School, as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

Students wearing protective face masks attend a class at Yio Chu Kang Secondary School, as schools reopen amid the coronavirus disease (COVID-19) outbreak in Singapore June 2, 2020. REUTERS/Edgar Su

An employee, wearing a protective face mask, serves customers during the reopening of La Prison du Bouffay restaurant at midnight in Nantes, France, June 2, 2020, as restaurants reopen amid the coronavirus disease (COVID-19) outbreak. REUTERS/Stephane Mahe

An employee, wearing a protective face mask, serves customers during the reopening of La Prison du Bouffay restaurant at midnight in Nantes, France, June 2, 2020, as restaurants reopen amid the coronavirus disease (COVID-19) outbreak. REUTERS/Stephane Mahe TPX IMAGES OF THE DAY

Employees, wearing protective face masks, work during the reopening of La Prison du Bouffay restaurant at midnight in Nantes, France, June 2, 2020, as restaurants reopen amid the coronavirus disease (COVID-19) outbreak. REUTERS/Stephane Mahe

A man wearing a protective face mask stands in front of a boarded up Starbucks shop ahead of a planned demonstration against the death in Minneapolis police custody of George Floyd, in Anaheim, California, U.S., June 1, 2020. REUTERS/Mike Blake

An employee, wearing a protective face mask, serves customers during the reopening of La Prison du Bouffay restaurant at midnight in Nantes, France, June 2, 2020, as restaurants reopen amid the coronavirus disease (COVID-19) outbreak. REUTERS/Stephane Mahe

Demonstrators wearing protective face masks take part in a rally following the death in Minneapolis police custody of George Floyd, in Boston, Massachusetts, U.S., June 1, 2020. REUTERS/Brian Snyder

Demonstrators wearing protective face masks hold signs during a rally following the death in Minneapolis police custody of George Floyd, in Boston, Massachusetts, U.S., June 1, 2020. REUTERS/Brian Snyder

A woman wearing a face mask with the words "I can't breathe" looks on during a protest against the death in Minneapolis police custody of George Floyd, in front of a U.S. consulate in Barcelona, Spain June 1, 2020. REUTERS/Nacho Doce TPX IMAGES OF THE DAY

Relatives and friends wear protective masks due to the coronavirus disease (COVID-19) outbreak, as they attend the funeral of Matheus Oliveira, 23, who according to his relatives and neighbours was shot dead during a police action in Catrambi slum, in Rio de Janeiro, Brazil, June 1, 2020. REUTERS/Ricardo Moraes

Friends wearing protective masks due to the coronavirus disease (COVID-19) outbreak, carry the coffin during the funeral of Matheus Oliveira, 23, who according to his relatives and neighbours was shot dead during a police action in Catrambi slum, in Rio de Janeiro, Brazil, June 1, 2020. REUTERS/Ricardo Moraes

Friends wearing protective masks due to the coronavirus disease (COVID-19) outbreak, carry the coffin during the funeral of Matheus Oliveira, 23, who according to his relatives and neighbours was shot dead during a police action in Catrambi slum, in Rio de Janeiro, Brazil, June 1, 2020. REUTERS/Ricardo Moraes

Friends wearing protective masks due to the coronavirus disease (COVID-19) outbreak, carry the coffin during the funeral of Matheus Oliveira, 23, who according to his relatives and neighbours was shot dead during a police action in Catrambi slum, in Rio de Janeiro, Brazil, June 1, 2020. REUTERS/Ricardo Moraes

People wear gloves as they clean graffiti at Bellevue Square during community cleanup after looting and vandalism that occurred Sunday in downtown Bellevue, Washington, U.S. June 1, 2020. REUTERS/Lindsey Wasson

Aymara women wearing face masks are seen on the first day of eased coronavirus disease (COVID-19) restrictions in La Paz, Bolivia, June 1, 2020. REUTERS/David Mercado

People wearing face masks are seen on the first day of eased coronavirus disease (COVID-19) restrictions in La Paz, Bolivia, June 1, 2020. REUTERS/David Mercado

A man wearing a face mask is seen on the first day of eased coronavirus disease (COVID-19) restrictions in La Paz, Bolivia, June 1, 2020. REUTERS/David Mercado

An employee, wearing a face mask, scans the temperature of a construction worker during the first day of the country's gradual re-opening of the economy for "essential" industries, as the coronavirus disease (COVID-19) outbreak continues in Mexico City, Mexico June 1, 2020. REUTERS/Edgard Garrido

A construction worker wearing a handkerchief over his mouth works on his job site during the first day of the country's gradual re-opening of the economy for "essential" industries, as the coronavirus disease (COVID-19) continues in Mexico City, Mexico June 1, 2020. REUTERS/Edgard Garrido

A construction worker, wearing a protective face mask, works on his job site during the first day of the country's gradual re-opening of the economy for "essential" industries, as the coronavirus disease (COVID-19) continues in Mexico City, Mexico June 1, 2020. REUTERS/Edgard Garrido

A woman wearing a mask walks in front of a city sign during nationwide unrest following the death in Minneapolis police custody of George Floyd, amid the global novel coronavirus outbreak in Santa Monica, California, U.S., June 1, 2020. REUTERS/Lucy Nicholson

A woman sweeping up outside looted stores wears a protective mask that reads: "Black Lives are greater than property" during nationwide unrest following the death in Minneapolis police custody of George Floyd, amid the global novel coronavirus outbreak in Santa Monica, California, U.S., June 1, 2020. REUTERS/Lucy Nicholson

People wear protective face masks during a protest against the death in Minneapolis police custody of George Floyd, in front of a U.S. consulate, in Barcelona, Spain June 1, 2020. REUTERS/Nacho Doce

People wear protective face masks during a protest against the death in Minneapolis police custody of George Floyd, in front of a U.S. consulate, in Barcelona, Spain June 1, 2020. REUTERS/Nacho Doce