Healthcare workers do a simulation for coronavirus vaccine clinical trials next week at the Faculty of Medicine at Padjadjaran University amid the COVID-19 pandemic in Bandung, Indonesia, August 6, 2020. REUTERS/Ajeng Dinar Ulfiana

A healthcare worker checks the tension of a volunteer during a simulation for coronavirus vaccine clinical trials next week at the Faculty of Medicine at Padjadjaran University amid the COVID-19 pandemic in Bandung, Indonesia, August 6, 2020. REUTERS/Ajeng Dinar Ulfiana

Staff members wearing protective face masks conduct a simulation on how to support social distancing at the entrance of the Kabukiza Theatre, where Japan's stately traditional kabuki theatre will resume on August 1 following a five-month closure due to the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan July 31, 2020. Picture taken July 31, 2020. REUTERS/Issei Kato

Staff members wearing protective face masks conduct a simulation for body temperature checks and hand sanitizing at the entrance of the Kabukiza Theatre, where Japan's stately traditional Kabuki theatre will resume on August 1 following a five-month closure due to the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan July 31, 2020. Picture taken July 31, 2020. REUTERS/Issei Kato

Members of Palestinian security forces loyal to Hamas spray disinfectants during a simulation exercise for preventing the spread of the coronavirus disease (COVID-19), in Gaza City July 18, 2020. Picture taken July 18, 2020. REUTERS/Mohammed Salem

Members of Palestinian security forces loyal to Hamas take part in a simulation exercise for preventing the spread of the coronavirus disease (COVID-19), in Gaza City July 18, 2020. Picture taken July 18, 2020. REUTERS/Mohammed Salem

A Palestinian girl looks out of her family home as she watches members of Hamas security forces participating in a simulation exercise for preventing the spread of the coronavirus disease (COVID-19), in Gaza City July 18, 2020. REUTERS/Mohammed Salem

Members of Palestinian security forces loyal to Hamas take part in a simulation exercise for preventing the spread of the coronavirus disease (COVID-19), in Gaza City July 18, 2020. REUTERS/Mohammed Salem

Members of Palestinian security forces loyal to Hamas spray disinfectants during a simulation exercise for preventing the spread of the coronavirus disease (COVID-19), in Gaza City July 18, 2020. REUTERS/Mohammed Salem

Palestinian health workers transfer a mock coronavirus disease patient during a simulation exercise for preventing the spread of COVID-19, in Gaza City July 18, 2020. REUTERS/Mohammed Salem

Members of Palestinian security forces loyal to Hamas take part in a simulation exercise for preventing the spread of the coronavirus disease (COVID-19), in Gaza City July 18, 2020. REUTERS/Mohammed Salem

Members of Palestinian security forces loyal to Hamas wear protective suits as they take part in a simulation exercise for preventing the spread of COVID-19, in Gaza City July 18, 2020. REUTERS/Mohammed Salem

Members of Palestinian security forces loyal to Hamas and health workers transfer a mock coronavirus disease patient during a simulation exercise for preventing the spread of COVID-19, in Gaza City July 18, 2020. REUTERS/Mohammed Salem

AH-64 Apache helicopters fly to location during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

AH1W helicopters fly to location during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

AH-64 Apache helicopters fly to location during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

AH-64 Apache helicopters fly to location during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Soldiers fire a 8 inch (203 mm) M110 self-propelled howitzer during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Multiple Launch Rocket System (MLRS) Thunderbolt-2000 fires rockets during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Taiwanese domestically-built Indigenous Defense Fighters (IDF) take part in the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Soldiers fire M109A2 155mm howitzers during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

An AH-1 Cobra helicopter fires during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

AH-64 Apache helicopters fires during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Multiple Launch Rocket System (MLRS) Thunderbolt-2000 fires rockets during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Soldiers take part in the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Soldiers and members of the media take part in the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

M60A3 tanks fire during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Soldiers take part in the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

An AH-1 Cobra helicopter fires during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Soldiers take part in the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

Members of Animal Rebellion wearing protective face masks take part in a protest against meat-eating and cruelty to animals, inside a fountain containing red dye, which simulates blood, at Catalunya square during the spread of the coronavirus disease (COVID-19) in Barcelona, Spain July 11, 2020. REUTERS/Nacho Doce

A padlock is pictured at the end of a protest against meat-eating and cruelty to animals, inside a fountain containing red dye, which simulates blood, at Catalunya square during the spread of the coronavirus disease (COVID-19) in Barcelona, Spain July 11, 2020. REUTERS/Nacho Doce

A member of Animal Rebellion wearing a protective face mask takes part in a protest against meat-eating and cruelty to animals, inside a fountain containing red dye, which simulates blood, at Catalunya square during the spread of the coronavirus disease (COVID-19) in Barcelona, Spain July 11, 2020. REUTERS/Nacho Doce

Members of Animal Rebellion wearing protective face masks take part in a protest against meat-eating and cruelty to animals, inside a fountain containing red dye, which simulates blood, at Catalunya square during the spread of the coronavirus disease (COVID-19) in Barcelona, Spain July 11, 2020. REUTERS/Nacho Doce

Members of Animal Rebellion wearing protective face masks take part in a protest against meat-eating and cruelty to animals, inside a fountain containing red dye, which simulates blood, at Catalunya square during the spread of the coronavirus disease (COVID-19) in Barcelona, Spain July 11, 2020. REUTERS/Nacho Doce

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take selfies during the "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

People who want to leave the island, but cannot due to coronavirus disease-related (COVID-19) travel restrictions, take part in a "fake" travel experience for tourists simulating the experience of using an international airport at Songshan airport in Taipei, Taiwan July 2, 2020. REUTERS/Ann Wang

Seibu Hospital's medical staff take part in a PCI (percutaneous coronary intervention) simulation training at the hospital in Yokohama, Japan, June 18, 2020. Picture taken on June 18, 2020. REUTERS/Kim Kyung-Hoon

Seibu Hospital's medical staff take part in a PCI (percutaneous coronary intervention) simulation training at the hospital in Yokohama, Japan, June 18, 2020. Picture taken on June 18, 2020. REUTERS/Kim Kyung-Hoon

Seibu Hospital's nurse Sho Osawa (C) takes part in a PCI (percutaneous coronary intervention) simulation training at the hospital in Yokohama, Japan, June 18, 2020. Picture taken on June 18, 2020. REUTERS/Kim Kyung-Hoon

Leszek Kowalik presents Respisave, a remote-controlled ventilator that will allow doctors to monitor and adjust the device for their patients at a distance, in a bid to make medical personnel safer amidst the coronavirus disease (COVID-19) outbreak, at Centre for Medical Simulation MedExcellence in Warsaw, Poland, June 8, 2020. Picture taken June 8, 2020. REUTERS/Kacper Pempel

Dr Lukasz Szarpak presents Respisave, a remote-controlled ventilator that will allow doctors to monitor and adjust the device for their patients at a distance, in a bid to make medical personnel safer amidst the coronavirus disease (COVID-19) outbreak, at Centre for Medical Simulation MedExcellence in Warsaw, Poland, June 8, 2020. Picture taken June 8, 2020. REUTERS/Kacper Pempel

Police trainees wearing personal protective equipment maintain social distancing in a train during a simulation exercise in preparation for the resumption of train operations, amid the coronavirus disease (COVID-19) outbreak, in Manila, Philippines May 26, 2020. REUTERS/Eloisa Lopez

Police trainees wearing personal protective equipment maintain social distancing at a train station during a simulation exercise in preparation for the resumption of train operations, amid the coronavirus disease (COVID-19) outbreak, in Manila, Philippines May 26, 2020. REUTERS/Eloisa Lopez

Police trainees wearing personal protective equipment maintain social distancing in a train during a simulation exercise in preparation for the resumption of train operations, amid the coronavirus disease (COVID-19) outbreak, in Manila, Philippines May 26, 2020. REUTERS/Eloisa Lopez

Police trainees wearing personal protective equipment maintain social distancing at a train station during a simulation exercise in preparation for the resumption of train operations, amid the coronavirus disease (COVID-19) outbreak, in Manila, Philippines May 26, 2020. REUTERS/Eloisa Lopez

Police trainees wearing personal protective equipment prepare to enter a train with social distancing measures during a simulation exercise in preparation for the resumption of train operations, amid the coronavirus disease (COVID-19) outbreak, in Manila, Philippines May 26, 2020. REUTERS/Eloisa Lopez

Police trainees wearing personal protective equipment maintain social distancing at a train station during a simulation exercise in preparation for the resumption of train operations, amid the coronavirus disease (COVID-19) outbreak, in Manila, Philippines May 26, 2020. REUTERS/Eloisa Lopez