Motorists wait at a traffic junction to enter the central business district in Singapore on June 4, 2020, as Singapore eases its partial lockdown restrictions aimed at curbing the spread of the COVID-19 novel coronavirus. (Photo by Roslan RAHMAN / AFP)

(200603) -- SINGAPORE, June 3, 2020 (Xinhua) -- Students take the train on the downtown line in Singapore on June 3, 2020. Singapore enters the second day of post lockdown as the state embarked on a phased reopening from a COVID-19 "circuit breaker" period to curb the spread of the coronavirus. (Photo by Then Chih Wey/Xinhua)

(200603) -- SINGAPORE, June 3, 2020 (Xinhua) -- People take the train on the downtown line in Singapore on June 3, 2020. Singapore enters the second day of post lockdown as the state embarked on a phased reopening from a COVID-19 "circuit breaker" period to curb the spread of the coronavirus. (Photo by Then Chih Wey/Xinhua)

(200603) -- SINGAPORE, June 3, 2020 (Xinhua) -- Students crowd into a bus stop as they wait for the public bus in Singapore's central area on June 3, 2020. Singapore enters the second day of post lockdown as the state embarked on a phased reopening from a COVID-19 "circuit breaker" period to curb the spread of the coronavirus. (Photo by Then Chih Wey/Xinhua)

(200602) -- SINGAPORE, June 2, 2020 (Xinhua) -- Primary school students wearing face masks arrive at school in Singapore on June 2, 2020. Schools in Singapore reopened on Tuesday as the state embarked on a phased reopening from a COVID-19 "circuit breaker" period to curb the spread of the coronavirus. (Photo by Then Chih Wey/Xinhua)

(200602) -- SINGAPORE, June 2, 2020 (Xinhua) -- A primary school student pulling a school bag arrives at school in Singapore on June 2, 2020. Schools in Singapore reopened on Tuesday as the state embarked on a phased reopening from a COVID-19 "circuit breaker" period to curb the spread of the coronavirus. (Photo by Then Chih Wey/Xinhua)

(200602) -- SINGAPORE, June 2, 2020 (Xinhua) -- A primary school student wearing a face mask arrives at school in Singapore on June 2, 2020. Schools in Singapore reopened on Tuesday as the state embarked on a phased reopening from a COVID-19 "circuit breaker" period to curb the spread of the coronavirus. (Photo by Then Chih Wey/Xinhua)

(200602) -- SINGAPORE, June 2, 2020 (Xinhua) -- Primary school students wearing face masks are seen on their way to school in Singapore on June 2, 2020. Schools in Singapore reopened on Tuesday as the state embarked on a phased reopening from a COVID-19 "circuit breaker" period to curb the spread of the coronavirus. (Photo by Then Chih Wey/Xinhua)

A man wearing a face mask uses a thermal scanner to check on the temperature of an individual before he can enter a building in Singapore Tuesday, June 2, 2020. Singapore reopened 75 percent of its economy Tuesday, as part of a three-phase controlled approach to end a virus lockdown since early April. (AP Photo/YK Chan)

A man scans a QR code before entering a building in Singapore Tuesday, June 2, 2020. Singapore reopened 75 percent of its economy Tuesday, as part of a three-phase controlled approach to end a virus lockdown since early April. (AP Photo/YK Chan)

A notice reminding people to wear masks hangs on a post as people walk by in Singapore Tuesday, June 2, 2020. Singapore reopened 75 percent of its economy Tuesday, as part of a three-phase controlled approach to end a virus lockdown since early April. (AP Photo/YK Chan)

Subway commuters emerge from the Raffles Place MRT exit in Singapore Tuesday, June 2, 2020. Singapore reopened 75 percent of its economy Tuesday, as part of a three-phase controlled approach to end a virus lockdown since early April. (AP Photo/YK Chan)

Children wearing face masks gather around a table inside their classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

Pre-school children gather around a table inside their classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

A pre-school teacher check on a child's health before entering the classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

A pre-school teacher checks the temperature of a child while the parent looks on before entering the classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

A pre-school teacher checks the temperature of a child before entering a classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

Pre-school teachers prepare to check a child before entering a classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

Parents looks on as their child enters a classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

Teachers prepare for health check on children before entering the classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

Teachers wait for children to arrive for health checks before entering the classroom as schools reopened in Singapore on June 2, 2020, as the city state eased its partial lockdown imposed to prevent the spread of COVID-19 in Singapore. (Photo by ROSLAN RAHMAN / AFP)

(200601) -- SINGAPORE, June 1, 2020 (Xinhua) -- Photo taken on June 1, 2020 shows an almost empty road in Singapore. Singapore's Ministry of Health (MOH) reported 518 new COVID-19 cases on Sunday, bringing the total confirmed cases in the country to 34,884. (Photo by Then Chih Wey/Xinhua)

(200601) -- SINGAPORE, June 1, 2020 (Xinhua) -- Photo taken on June 1, 2020 shows an almost empty road along Singapore's Marina Bay. Singapore's Ministry of Health (MOH) reported 518 new COVID-19 cases on Sunday, bringing the total confirmed cases in the country to 34,884. (Photo by Then Chih Wey/Xinhua)

(200601) -- SINGAPORE, June 1, 2020 (Xinhua) -- A woman walks in the Supertree Grove at Singapore's Gardens by the Bay on June 1, 2020. Singapore's Ministry of Health (MOH) reported 518 new COVID-19 cases on Sunday, bringing the total confirmed cases in the country to 34,884. (Photo by Then Chih Wey/Xinhua)

(200601) -- SINGAPORE, June 1, 2020 (Xinhua) -- Photo taken on June 1, 2020 shows Singapore's Gardens by the Bay. Singapore's Ministry of Health (MOH) reported 518 new COVID-19 cases on Sunday, bringing the total confirmed cases in the country to 34,884. (Photo by Then Chih Wey/Xinhua)

(200602) -- BEIJING, June 2, 2020 (Xinhua) -- Photo taken on June 1, 2020 shows an almost empty road along Singapore's Marina Bay. (Photo by Then Chih Wey/Xinhua)

19.05.2020, Singapur, Republik Singapur, Asien - Menschenleerer Merlion Park mit Springbrunnen am Ufer des Singapore River und Wolkenkratzer des Geschaeftsviertels im Hintergrund inmitten der Coronavirus-Krise Covid-19. Fuer gewoehnlich wimmelt die Gegend um Marina Bay von Touristen ist jetzt aber bis auf wenige Personen total verwaist. *** 19 05 2020, Singapore, Republic of Singapore, Asia Empty Merlion Park with fountain on the banks of the Singapore River and skyscrapers of the business district in the background in the middle of the coronavirus crisis Covid 19 For usually the area around Marina Bay is swarming with tourists but now, except for a few people, it is completely deserted

19.05.2020, Singapur, Republik Singapur, Asien - Ein Mann mit Mundschutz geht im Bishan-Ang Mo Kio Park an einem Hinweisschild zu Covid-19 vorbei, welches auf verpflichtende Massnahmen hinweist, um die Ausbreitung des Coronavirus weiter einzuschraenken. Mit der Ausnahme von koerperlich anstrengenden Aktivitaeten wie Radfahren oder Joggen muss ein jeder zu jederzeit einen Mundschutz tragen, sobald er sein Zuhause verlaesst und sich im Freien oder in der Oeffentlichkeit aufhaelt. *** 19 05 2020, Singapore, Republic of Singapore, Asia A man wearing a mouthguard passes a Covid 19 sign in Bishan Ang Mo Kio Park indicating mandatory measures to further reduce the spread of corona virus Except for physically demanding activities such as cycling or jogging, everyone must wear a mouthguard at all times when leaving home and outdoors or in public

19.05.2020, Singapur, Republik Singapur, Asien - Blick von der Jubilee Bridge auf den menschenleeren Merlion Park am Ufer des Singapore River und Wolkenkratzer des Geschaeftsviertels im Hintergrund inmitten der Coronavirus-Krise Covid-19. Fuer gewoehnlich wimmelt die Gegend um Marina Bay von Touristen ist jetzt aber bis auf wenige Personen total verwaist. *** 19 05 2020, Singapore, Republic of Singapore, Asia View from the Jubilee Bridge to the deserted Merlion Park on the banks of the Singapore River and skyscrapers of the business district in the background in the middle of the coronavirus crisis Covid 19 For usually the area around Marina Bay is teeming with tourists but now it is totally deserted except for a few people

19.05.2020, Singapur, Republik Singapur, Asien - Menschenleerer Merlion Park mit Springbrunnen am Ufer des Singapore River und Wolkenkratzer des Geschaeftsviertels im Hintergrund inmitten der Coronavirus-Krise Covid-19. Fuer gewoehnlich wimmelt die Gegend um Marina Bay von Touristen ist jetzt aber bis auf wenige Personen total verwaist. *** 19 05 2020, Singapore, Republic of Singapore, Asia Empty Merlion Park with fountain on the banks of the Singapore River and skyscrapers of the business district in the background in the middle of the coronavirus crisis Covid 19 For usually the area around Marina Bay is swarming with tourists but now, except for a few people, it is completely deserted

19.05.2020, Singapur, Republik Singapur, Asien - Menschenleerer Merlion Park mit Springbrunnen am Ufer des Singapore River und Wolkenkratzer des Geschaeftsviertels im Hintergrund inmitten der Coronavirus-Krise Covid-19. Fuer gewoehnlich wimmelt die Gegend um Marina Bay von Touristen ist jetzt aber bis auf wenige Personen total verwaist. *** 19 05 2020, Singapore, Republic of Singapore, Asia Empty Merlion Park with fountain on the banks of the Singapore River and skyscrapers of the business district in the background in the middle of the coronavirus crisis Covid 19 For usually the area around Marina Bay is swarming with tourists but now, except for a few people, it is completely deserted

19.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum entlang der Eu Tong Sen Street waehrend der Ausgangsbeschraenkung inmitten der Coronakrise Covid-19. *** 19 05 2020, Singapore, Republic of Singapore, Asia Empty streets and little traffic in the city centre along Eu Tong Sen Street during the exit restriction in the middle of the corona crisis Covid 19

19.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum entlang der New Bridge Road waehrend der Ausgangsbeschraenkung inmitten der Coronakrise Covid-19. *** 19 05 2020, Singapore, Republic of Singapore, Asia Empty streets and little traffic in the city centre along New Bridge Road during the exit restriction in the middle of the corona crisis Covid 19

19.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum entlang der New Bridge Road waehrend der Ausgangsbeschraenkung inmitten der Coronakrise Covid-19. *** 19 05 2020, Singapore, Republic of Singapore, Asia Empty streets and little traffic in the city centre along New Bridge Road during the exit restriction in the middle of the corona crisis Covid 19

19.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum entlang der Prinsep Street waehrend der Ausgangsbeschraenkung inmitten der Coronakrise Covid-19. *** 19 05 2020, Singapore, Republic of Singapore, Asia Empty streets and hardly any traffic in the city centre along Prinsep Street during the exit restriction in the middle of the corona crisis Covid 19

19.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum entlang der Paterson Road waehrend der Ausgangsbeschraenkung inmitten der Coronakrise Covid-19. *** 19 05 2020, Singapore, Republic of Singapore, Asia Empty streets and little traffic in the city centre along Paterson Road during the exit restriction in the middle of the corona crisis Covid 19

A vendor wearing a face mask prepares to display traditional Chinese medicinal products outside a Chinese medical hall in Singapore???s Chinatown district on Tuesday, May 12, 2020. Singapore has allowed selected businesses such as traditional Chinese medicine medical halls, home-based establishments, food manufacturing, selected food retail outlets, laundry services, traditional barbers and pet supplies to reopen May 12 in a cautious rollback of a two-month partial lockdown to curb the spread of COVID-19 infections in the city-state. (AP Photo/YK Chan)

A man wearing a face mask looks at traditional Chinese medicinal products inside a Chinese medical hall in Singapore???s Chinatown district on Tuesday, May 12, 2020. Singapore has allowed selected businesses such as traditional Chinese medicine medical halls, home-based establishments, food manufacturing, selected food retail outlets, laundry services, traditional barbers and pet supplies to reopen May 12 in a cautious rollback of a two-month partial lockdown to curb the spread of COVID-19 infections in the city-state. (AP Photo / YK Chan)

A man wearing a face mask crosses the street in Singapore???s Chinatown district on Tuesday, May 12, 2020. Singapore has allowed selected businesses such as traditional Chinese medicine medical halls, home-based establishments, food manufacturing, selected food retail outlets, laundry services, traditional barbers and pet supplies to reopen May 12 in a cautious rollback of a two-month partial lockdown to curb the spread of COVID-19 infections in the city-state. (AP Photo/YK Chan)

A vendor wearing a face mask prepares to display traditional Chinese medicinal products outside a Chinese medical hall in Singapore???s Chinatown district on Tuesday, May 12, 2020. Singapore has allowed selected businesses such as traditional Chinese medicine medical halls, home-based establishments, food manufacturing, selected food retail outlets, laundry services, traditional barbers and pet supplies to reopen May 12 in a cautious rollback of a two-month partial lockdown to curb the spread of COVID-19 infections in the city-state. (AP Photo/YK Chan)

A barber and a male customer wear face masks during a haircut at a barber shop on Tuesday, May 12, 2020 in Singapore. Singapore has allowed selected businesses such as traditional Chinese medicine medical halls, home-based establishments, food manufacturing, selected food retail outlets, laundry services, traditional barbers and pet supplies to reopen May 12 in a cautious rollback of a two-month partial lockdown to curb the spread of COVID-19 infections in the city-state. (AP Photo/Royston Chan)

A barber wearing a face mask as a prevention measure against the spread of the COVID-19 coronavirus attends to a customer at a hair salon, after they reopened as restrictions to contain the outbreak were relaxed, in Singapore on May 12, 2020. (Photo by ROSLAN RAHMAN / AFP)

A staff member at a hair salon wearing a face mask as a prevention measure against the spread of the COVID-19 coronavirus looks into the salon, after they reopened as restrictions to contain the outbreak were relaxed, in Singapore on May 12, 2020. (Photo by ROSLAN RAHMAN / AFP)

Staff members at a hair salon wearing face masks as a prevention measure against the spread of the COVID-19 coronavirus wait for customers, after they reopened as restrictions to contain the outbreak were relaxed, in Singapore on May 12, 2020. (Photo by ROSLAN RAHMAN / AFP)

A hairdresser and barber (R) wearing face masks as a prevention measure against the spread of the COVID-19 coronavirus attend to customers at a hair salon, after they reopened as restrictions to contain the outbreak were relaxed, in Singapore on May 12, 2020. (Photo by ROSLAN RAHMAN / AFP)

A barber wearing a face mask as a prevention measure against the spread of the COVID-19 coronavirus attends to a customer at a hair salon, after they reopened as restrictions to contain the outbreak were relaxed, in Singapore on May 12, 2020. (Photo by ROSLAN RAHMAN / AFP)

People wearing face masks as a prevention measure against the spread of the COVID-19 coronavirus scan a QR code before entering a hair salon, after they reopened as restrictions to contain the outbreak were relaxed, in Singapore on May 12, 2020. (Photo by ROSLAN RAHMAN / AFP)

People wearing face masks as a prevention measure against the spread of the COVID-19 coronavirus queue outside a McDonald's fast food restaurant on its first day of opening after three weeks closure due to the pandemic in Singapore on May 11, 2020. (Photo by ROSLAN RAHMAN / AFP)

A customer (L) wearing a face mask as a prevention measure against the spread of the COVID-19 coronavirus waits to enter a McDonald's fast food restaurant on its first day of opening after three weeks closure due to the pandemic in Singapore on May 11, 2020. (Photo by ROSLAN RAHMAN / AFP)

A staff member wearing a face mask as a prevention measure against the spread of the COVID-19 coronavirus takes the temperature of a customer lining up outside a McDonald's fast food restaurant on its first day of opening after three weeks closure due to the pandemic in Singapore on May 11, 2020. (Photo by ROSLAN RAHMAN / AFP)

People wearing face masks as a prevention measure against the spread of the COVID-19 coronavirus queue outside a McDonald's fast food restaurant on its first day of opening after three weeks closure due to the pandemic in Singapore on May 11, 2020. (Photo by ROSLAN RAHMAN / AFP)

A man wearing a face mask as prevention measure against the spread of the COVID-19 coronavirus, walks along an alley of restaurants carrying take away food in Singapore on May 11, 2020. (Photo by Roslan RAHMAN / AFP)

(200509) -- INDIA, May 9, 2020 (Xinhua) -- Medics gesture as they wait to screen stranded Indians arriving from Singapore at an airport in New Delhi, India, on May 8, 2020. The flights bringing back stranded Indians from abroad have begun to arrive in India, officials said Friday. (Photo by Partha Sarkar/Xinhua)

(200509) -- INDIA, May 9, 2020 (Xinhua) -- Medics screen stranded Indians arriving from Singapore at an airport in New Delhi, India, on May 8, 2020. The flights bringing back stranded Indians from abroad have begun to arrive in India, officials said Friday. (Photo by Partha Sarkar/Xinhua)

(200509) -- INDIA, May 9, 2020 (Xinhua) -- Stranded Indians arriving from Singapore come out of an airport in New Delhi, India, on May 8, 2020. The flights bringing back stranded Indians from abroad have begun to arrive in India, officials said Friday. (Photo by Partha Sarkar/Xinhua)

(200509) -- INDIA, May 9, 2020 (Xinhua) -- Stranded Indians arriving from Singapore board buses at an international airport in New Delhi, India, on May 8, 2020. The flights bringing back stranded Indians from abroad have begun to arrive in India, officials said Friday. (Photo by Partha Sarkar/Xinhua)

A health worker screens an Indian who arrived from Singapore at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Security officers stand guard as stranded Indians arrive from Singapore at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Health workerS screen stranded Indian who arrived from Singapore at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Health worker screen stranded Indians who arrived from Singapore at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

An airport worker watches health workers screen stranded Indians who arrived from Singapore at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Health workers screen stranded Indians who arrived from Singapore, at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Health workers wait to screen stranded Indians who arrived from Singapore at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Health workers screen stranded Indians who arrived from Singapore, at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Stranded Indians who arrived from Singapore walk to board buses at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Stranded Indians who arrived from Singapore board buses at the Indira Gandhi international airport in New Delhi, India, Friday, May 8,2020. India is carrying out several repatriation flights to bring back citizens stranded in various countries. (AP Photo/Manish Swarup)

Stranded Indian passenger who arrived by an Air India flight from Singapore, wearing protective gear as a precaution at the Indira Gandhi international airport. India has started a very large scale of air evacuation operations for repatriation of stranded abroad passengers. (Photo by Amarjeet Kumar Singh / SOPA Imag/Sipa USA)

Stranded Indians who arrived from Singapore, boarding buses at the Indira Gandhi international airport. India has started a very large scale of air evacuation operations for repatriation of stranded abroad passengers. (Photo by Amarjeet Kumar Singh / SOPA Imag/Sipa USA)

Indian passenger who arrived by an Air India flight from Singapore talks to officials after their arrival at the Indira Gandhi international airport. India has started a very large scale of air evacuation operations for repatriation of stranded abroad passengers. (Photo by Amarjeet Kumar Singh / SOPA Imag/Sipa USA)

Stranded Indian passenger who arrived by an Air India flight from Singapore, wearing protective gear as a precaution at the Indira Gandhi international airport. India has started a very large scale of air evacuation operations for repatriation of stranded abroad passengers. (Photo by Amarjeet Kumar Singh / SOPA Imag/Sipa USA)

Stranded Indian passenger who arrived by an Air India flight from Singapore, wearing protective gear as a precaution at the Indira Gandhi international airport. India has started a very large scale of air evacuation operations for repatriation of stranded abroad passengers. (Photo by Amarjeet Kumar Singh / SOPA Imag/Sipa USA)

Stranded Indians who arrived from Singapore, boarding buses at the Indira Gandhi international airport. India has started a very large scale of air evacuation operations for repatriation of stranded abroad passengers. (Photo by Amarjeet Kumar Singh / SOPA Imag/Sipa USA)

Stranded Indian passenger who arrived by an Air India flight from Singapore, wearing protective gear as a precaution at the Indira Gandhi international airport. India has started a very large scale of air evacuation operations for repatriation of stranded abroad passengers. (Photo by Amarjeet Kumar Singh / SOPA Imag/Sipa USA)

Stranded Indian passengers who arrived by an Air India flight from Singapore wait at the Indira Gandhi international airport. India has started a very large scale of air evacuation operations for repatriation of stranded abroad passengers. (Photo by Amarjeet Kumar Singh / SOPA Imag/Sipa USA)

An elderly woman wearing a protective facemask amid fears about the spread of the COVID-19 coronavirus collects used cardboard in an alley in Singapore on May 8, 2020. (Photo by ROSLAN RAHMAN / AFP)

An elderly woman wearing a protective facemask amid fears about the spread of the COVID-19 coronavirus pushes cart past a wall mural of an elderly person in Singapore on May 8, 2020. (Photo by ROSLAN RAHMAN / AFP)

People wearing protective facemasks amid fears about the spread of the COVID-19 coronavirus visit a fruits stall in Singapore on May 8, 2020. (Photo by ROSLAN RAHMAN / AFP)

A vendor wearing a protective facemask amid fears about the spread of the COVID-19 coronavirus serves a customer at a fruit stall in Singapore on May 8, 2020. (Photo by ROSLAN RAHMAN / AFP)

A man wearing a protective facemask amid fears about the spread of the COVID-19 coronavirus sorts out onions outside a grocery store in Singapore on May 8, 2020. (Photo by ROSLAN RAHMAN / AFP)

A man wearing a protective facemask amid fears about the spread of the COVID-19 coronavirus carries bags of groceries walks past a wall mural of an elderly person in Singapore on May 8, 2020. (Photo by ROSLAN RAHMAN / AFP)

Indian citizens evacuated from Singapore by Air India flight arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. (Photo by Prakash SINGH / AFP)

Indian citizens evacuated from Singapore by Air India flight arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. (Photo by Prakash SINGH / AFP)

Indian citizens evacuated from Singapore by Air India flight arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. (Photo by Prakash SINGH / AFP)

Indian citizens evacuated from Singapore by Air India flight arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. (Photo by Prakash SINGH / AFP)

Security personnel patrol as Indian citizens evacuated from Singapore by Air India flight arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. (Photo by Prakash SINGH / AFP)

Indian citizens evacuated from Singapore by Air India flight arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on Friday from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Flight crew arrive at Indira Gandhi International airport during a government-imposed nationwide lockdown as a preventive measure against the COVID-19 coronavirus, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Health officials wait for Indian citizens evacuated from Singapore by Air India flight, as they arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Health officials take personal details of Indian citizens evacuated from Singapore by Air India flight arrived at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Health officials wait for Indian citizens of Haryana state, evacuated from Singapore by Air India flight, as they arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Health officials take personal details of Indian citizens evacuated from Singapore by Air India flight arrived at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Men wait at Indira Gandhi International airport during a government-imposed nationwide lockdown as a preventive measure against the COVID-19 coronavirus, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Passenger flights parked at Indira Gandhi International airport are seen during a government-imposed nationwide lockdown as a preventive measure against the COVID-19 coronavirus, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Health officials wait for Indian citizens evacuated from Singapore by Air India flight, as they arrive at the Indira Gandhi International airport as part of a massive repatriation effort due to the COVID-19 coronavirus pandemic, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

Indian security personnels patrol at Indira Gandhi International Airport during a government-imposed nationwide lockdown as a preventive measure against the COVID-19 coronavirus, in New Delhi on May 8, 2020. - Around 1,000 Indians were scheduled to arrive in India on May 8 from Dhaka, Singapore, Riyadh, Manama and Dubai. (Photo by Prakash SINGH / AFP)

View of a cordoned off playground amid Coronavirus (COVID-19) lockdown. Strict measures were imposed by the Singapore government starting from 7th April to curb the spread of Coronavirus (COVID-19). (Photo by Maverick Asio / SOPA Images/Sipa USA)

View of a cordoned off playground amid Coronavirus (COVID-19) lockdown. Strict measures were imposed by the Singapore government starting from 7th April to curb the spread of Coronavirus (COVID-19). (Photo by Maverick Asio / SOPA Images/Sipa USA)

View of a cordoned off playground amid Coronavirus (COVID-19) lockdown. Strict measures were imposed by the Singapore government starting from 7th April to curb the spread of Coronavirus (COVID-19). (Photo by Maverick Asio / SOPA Images/Sipa USA)

People, wearing face masks as a preventive measure against the spread of the COVID-19 novel coronavirus, cross the road along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

People, wearing face masks as a preventive measure against the spread of the COVID-19 novel coronavirus, cross the road along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

A jogger, wearing a face mask as a preventive measure against the spread of the COVID-19 novel coronavirus, runs past a closed mall along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

People, wearing face masks as a preventive measure against the spread of the COVID-19 novel coronavirus, walk past a closed retail mall along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

A vendor, wearing a face mask as a preventive measure against the spread of the COVID-19 novel coronavirus, mans a booth selling kebabs along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

People, wearing face masks as a preventive measure against the spread of the COVID-19 novel coronavirus, cross a road along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

Tape is used to mark off spaces for social distancing, as a preventive measure against the spread of the COVID-19 novel coronavirus, on benches in front of a closed retail mall along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

An employee, wearing a face mask as a preventive measure against the spread of the COVID-19 novel coronavirus, mans a shop along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

A man, wearing a face mask as a preventive measure against the spread of the COVID-19 novel coronavirus, carries a bag of groceries as he walks past a closed retail mall along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

People, wearing face masks as a preventive measure against the spread of the COVID-19 novel coronavirus, cross a road along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

People, wearing face masks as a preventive measure against the spread of the COVID-19 novel coronavirus, walk past closed retail shops along the Orchard Road shopping belt in Singapore on May 6, 2020. (Photo by Roslan RAHMAN / AFP)

Workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, relax in their temporary living quarters during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

Workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, relax in their temporary living quarters during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

Workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, relax in their temporary living quarters during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

Workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, play carrom in their temporary living quarters during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

A worker, who has been registered as providing essential services during the COVID-19 novel coronavirus pandemic, uses his mobile phone as he sits on his bed in his temporary living quarters during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

A worker, who has been registered as providing essential services during the COVID-19 novel coronavirus pandemic, uses his mobile phone as he sits on his bed in his temporary living quarters during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

A view of the temporary living quarters of workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, is seen during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

A bottle of hand sanitiser is seen attached a column in a temporary living quarters for workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

Workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, relax in their temporary living quarters during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

Workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, relax in their temporary living quarters during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

Workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, are seen at a construction site in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

A general view shows the temporary living quarters for workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, during a media tour in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

Social distancing markers are displayed in the dining area for workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, during a media tour of their temporary living quarters in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

Social distancing markers are displayed in the dining area for workers, who have been registered as providing essential services during the COVID-19 novel coronavirus pandemic, during a media tour of their temporary living quarters in Singapore on May 5, 2020. (Photo by Roslan RAHMAN / AFP)

05.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum waehrend des Lockdown auf Grund der Coronakrise Covid-19. *** 05 05 2020, Singapore, Republic of Singapore, Asia Empty streets and little traffic in the city centre during the lockdown due to the corona crisis Covid 19

05.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum waehrend des Lockdown auf Grund der Coronakrise Covid-19. Im Hintergrund ragen die Wolkenkratzer des Geschaeftsviertels in die Hoehe. *** 05 05 2020, Singapore, Republic of Singapore, Asia Empty streets and hardly any traffic in the city centre during the lockdown due to the corona crisis Covid 19 In the background, the skyscrapers of the business district are rising

05.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum waehrend des Lockdown auf Grund der Coronakrise Covid-19. *** 05 05 2020, Singapore, Republic of Singapore, Asia Empty streets and little traffic in the city centre during the lockdown due to the corona crisis Covid 19

05.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum waehrend des Lockdown auf Grund der Coronakrise Covid-19. Im Hintergrund ragen die Wolkenkratzer des Geschaeftsviertels in die Hoehe. *** 05 05 2020, Singapore, Republic of Singapore, Asia Empty streets and hardly any traffic in the city centre during the lockdown due to the corona crisis Covid 19 In the background, the skyscrapers of the business district are rising

05.05.2020, Singapur, Republik Singapur, Asien - Leere Strassen und kaum Verkehr im Stadtzentrum waehrend des Lockdown auf Grund der Coronakrise Covid-19. *** 05 05 2020, Singapore, Republic of Singapore, Asia Empty streets and little traffic in the city centre during the lockdown due to the corona crisis Covid 19