A woman walks past the logo of Airobotics, an Israeli company which says it has developed two pilotless drones that are being trialled by Singapore's police to help enforce social distancing measures aimed at containing the spread of the coronavirus disease (COVID-19), at their offices in Petah Tikva, Israel August 4, 2020. Picture taken August 4, 2020. REUTERS/Ammar Awad

Employees of Airobotics, an Israeli company which says it has developed two pilotless drones that are being trialled by Singapore's police to help enforce social distancing measures aimed at containing the spread of the coronavirus disease (COVID-19), work at the company's laboratory in Petah Tikva, Israel August 4, 2020. Picture taken August 4, 2020. REUTERS/Ammar Awad

An employee of Airobotics, an Israeli company which says it has developed two pilotless drones that are being trialled by Singapore's police to help enforce social distancing measures aimed at containing the spread of the coronavirus disease (COVID-19), works at the company's laboratory in Petah Tikva, Israel August 4, 2020. Picture taken August 4, 2020. REUTERS/Ammar Awad

An employee of Airobotics, an Israeli company which says it has developed two pilotless drones that are being trialled by Singapore's police to help enforce social distancing measures aimed at containing the spread of the coronavirus disease (COVID-19), looks on during a demonstration for Reuters at their offices in Petah Tikva, Israel August 4, 2020. Picture taken August 4, 2020. REUTERS/Ammar Awad

The offices of Airobotics, an Israeli company which says it has developed two pilotless drones that are being trialled by Singapore's police to help enforce social distancing measures aimed at containing the spread of the coronavirus disease (COVID-19), are seen in Petah Tikva, Israel August 4, 2020. Picture taken August 4, 2020. REUTERS/Ammar Awad

Ran Krauss, CEO of Airobotics, an Israeli company which says it has developed two pilotless drones that are being trialled by Singapore's police to help enforce social distancing measures aimed at containing the spread of the coronavirus disease (COVID-19), poses for a picture at their offices in Petah Tikva, Israel August 4, 2020. Picture taken August 4, 2020. REUTERS/Ammar Awad

The logo of the digital payment service WeChat Pay is seen at a shop in Beijing, China August 6, 2020. REUTERS/Thomas Peter

A QR code of the digital payment service WeChat Pay is seen at a shop in Beijing, China August 6, 2020. REUTERS/Thomas Peter

QR codes of the digital payment services WeChat Pay and Alipay are seen at a shop in Beijing, China August 6, 2020. REUTERS/Thomas Peter

A man walks past a tractor placed on a pedestal outside a tractor plant in Minsk, Belarus August 4, 2020. Picture taken August 4, 2020. REUTERS/Vasily Fedosenko

Somali analysts monitor the weather patterns at the early warning centre designed to help Somalia predict disasters in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

Somali analysts monitor the weather patterns at the early warning centre designed to help Somalia predict disasters in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

Somali analysts monitor the weather patterns at the early warning centre designed to help Somalia predict disasters in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

Somali analysts monitor the weather patterns at the early warning centre designed to help Somalia predict disasters in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

A Somali analyst monitors the weather patterns at the early warning centre designed to help Somalia predict disasters in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

A Somali analyst monitors the weather patterns at the early warning centre designed to help Somalia predict disasters in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

Khadar Sheikh Mohamed director of the new national disaster early warning centre designed to help Somalia predict disasters monitors the weather patterns in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

Khadar Sheikh Mohamed director of the new national disaster early warning centre designed to help Somalia predict disasters monitors the weather patterns in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

A Somali analyst monitors the weather patterns at the early warning centre designed to help Somalia predict disasters in Wadajir district of Mogadishu, Somalia August 4, 2020. REUTERS/Feisal Omar

A man repairs a bicycle at a roadside shop during the coronavirus disease (COVID-19) pandemic in New Delhi, India, August 4, 2020. REUTERS/Adnan Abidi

'Mozo', a robot waiter of MARSES Robotic Solutions, waits next to customers amid the coronavirus disease (COVID-19) at Kimbo Restaurant & Cafe in Cairo, Egypt July 28, 2020. Picture taken July 28, 2020. REUTERS/Ahmed Fahmy

'Mozo', a robot waiter of MARSES Robotic Solutions, waits next to customers amid the coronavirus disease (COVID-19) at Kimbo Restaurant & Cafe in Cairo, Egypt July 28, 2020. Picture taken July 28, 2020. REUTERS/Ahmed Fahmy

'Mozo', a robot waiter of MARSES Robotic Solutions, serves food to limit contact amid the coronavirus disease (COVID-19) at Kimbo Restaurant & Cafe in Cairo, Egypt July 28, 2020. Picture taken July 28, 2020. REUTERS/Ahmed Fahmy

'Mozo', a robot waiter of MARSES Robotic Solutions, serves food to limit contact amid the coronavirus disease (COVID-19) at Kimbo Restaurant & Cafe in Cairo, Egypt July 28, 2020. Picture taken July 28, 2020. REUTERS/Ahmed Fahmy

Aladdin Al-Howainy, sales and marketing manager at MARSES Robotic Solutions, adjusts 'Mozo', a waiter robot used to limit contact amid the coronavirus disease (COVID-19) at Kimbo Restaurant & Cafe in Cairo, Egypt July 28, 2020. Picture taken July 28, 2020. REUTERS/Ahmed Fahmy

Laborers work with test lungs at an assembly line to produce ventilators amid spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

Women check ventilators at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

A woman checks ventilators at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

A man checks a mainboard at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

A man checks a mainboard at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

A woman works at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

A man checks mainboards at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

Laborers work at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

Laborers work at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

Laborers work at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

A woman checks a ventilator at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

Laborers work at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

A woman holds ventilator at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

A woman works at an assembly line to produce ventilators amid the spread of the coronavirus disease (COVID-19) at Vsmart factory of Vingroup outside Hanoi, Vietnam August 3, 2020. REUTERS/Kham

Dr. Benjamin Tee, Assistant Professor of Materials Science and Engineering at the National University of Singapore (NUS), demonstrates how his device can detect the texture of a squishy stress ball at a lab in NUS, Singapore July 27, 2020. Picture taken July 27, 2020. REUTERS/Joseph Campbell

Dr. Benjamin Tee, Assistant Professor of Materials Science and Engineering at the National University of Singapore (NUS), sits for an interview at a lab in NUS, Singapore July 27, 2020. REUTERS/Joseph Campbell

A researcher at the National University of Singapore (NUS) demonstrates the self-healing abilities of an artificial, transparent skin by cutting into it with a retractable knife at a lab in NUS, Singapore July 27, 2020. Picture taken July 27, 2020. REUTERS/Joseph Campbell

Dr. Benjamin Tee, Assistant Professor of Materials Science and Engineering at the National University of Singapore (NUS), demonstrates how his device can detect the texture of a solid plastic ball at a lab in NUS, Singapore July 27, 2020.Picture taken July 27, 2020. REUTERS/Joseph Campbell

Dr. Benjamin Tee, Assistant Professor of Materials Science and Engineering at the National University of Singapore (NUS), demonstrates how his device can detect the texture of a soft stress ball at a lab in NUS, Singapore July 27, 2020. Picture taken July 27, 2020. REUTERS/Joseph Campbell

Dr. Benjamin Tee, Assistant Professor of Materials Science and Engineering at the National University of Singapore (NUS), prepares to demonstrate how his device can detect the texture of a soft stress ball at a lab in NUS, Singapore July 27, 2020. Picture taken July 27, 2020. REUTERS/Joseph Campbell

A light emitting skin developed by Dr. Benjamin Tee, Assistant Professor of Materials Science and Engineering at the National University of Singapore (NUS), and his team is displayed at a lab in NUS, Singapore July 27, 2020. Picture taken July 27, 2020. REUTERS/Joseph Campbell

A man walks past the Bytedance headquarters building in Beijing, China August 3, 2020. REUTERS/Carlos Garcia Rawlins

People walk past the Bytedance headquarters building in Beijing, China August 3, 2020. REUTERS/Carlos Garcia Rawlins

A woman puts on medical personal protection equipment as she displays it for media members, at an exhibition hall that has been converted into a makeshift treatment facility to treat patients of the coronavirus disease (COVID-19) in Hong Kong, China August 1, 2020. REUTERS/Pak Yiu

An exhibition hall that has been converted into a makeshift treatment facility to treat patients of the coronavirus disease (COVID-19) is pictured in Hong Kong, China August 1, 2020. REUTERS/Pak Yiu

Bed area is seen at an exhibition hall that has been converted into a makeshift treatment facility to treat patients of the coronavirus disease (COVID-19) is pictured in Hong Kong, China August 1, 2020. REUTERS/Pak Yiu

An exhibition hall that has been converted into a makeshift treatment facility to treat patients of the coronavirus disease (COVID-19) is pictured in Hong Kong, China August 1, 2020. REUTERS/Pak Yiu

A bed is seen at an exhibition hall that has been converted into a makeshift treatment facility to treat patients of the coronavirus disease (COVID-19) in Hong Kong, China August 1, 2020. REUTERS/Pak Yiu

Part of the payment negotiations between ransom - seeking cybercriminals - marked "Support" - and a representative of travel giant CWT - marked "You" is seen in this photo taken in Washington, D.C., U.S., July 30, 2020. Picture taken July 30, 2020. REUTERS/Raphael Satter

Part of the payment negotiations between ransom -seeking cybercriminals - marked "Support" - and a representative of travel giant CWT - marked "You" is seen in this photo taken in Washington, D.C., U.S., July 30, 2020. Picture taken July 30, 2020. REUTERS/Raphael Satter

Part of the payment negotiations between ransom -seeking cybercriminals - marked "Support" - and a representative of travel giant CWT - marked "You" is seen in this photo taken in Washington, D.C., U.S., July 30, 2020. Picture taken July 30, 2020. REUTERS/Raphael Satter

Part of the payment negotiations between ransom -seeking cybercriminals - marked "Support" - and a representative of travel giant CWT - marked "You" is seen in this photo taken in Washington, D.C., U.S., July 30, 2020. Picture taken July 30, 2020. REUTERS/Raphael Satter

The Stop COVID NI app used for contact tracing the spread of coronavirus disease (COVID-19) in Northern Ireland is displayed on a mobile phone, as it is held up for an illustration photograph July 31, 2020. REUTERS/Clodagh Kilcoyne/Illustration

The Stop COVID NI app used for contact tracing the spread of coronavirus disease (COVID-19) in Northern Ireland is displayed on a mobile phone, as it is held up for an illustration photograph July 31, 2020. REUTERS/Clodagh Kilcoyne/Illustration

The Stop COVID NI app used for contact tracing the spread of coronavirus disease (COVID-19) in Northern Ireland is displayed on a mobile phone, as it is held up for an illustration photograph July 31, 2020. REUTERS/Clodagh Kilcoyne/Illustration