Students take part in an exam to enter the new high school academic year, with social distancing measures, as the outbreak of the coronavirus disease (COVID-19) continues, in Ciudad Juarez, Mexico August 10, 2020. REUTERS/Jose Luis Gonzalez

A teacher checks an evaluation guide as students take part in an exam to enter the new high school academic year, with social distancing measures, as the outbreak of the coronavirus disease (COVID-19) continues, in Ciudad Juarez, Mexico August 10, 2020. REUTERS/Jose Luis Gonzalez

Students take part in an exam to enter the new high school academic year, with social distancing measures, as the outbreak of the coronavirus disease (COVID-19) continues, in Ciudad Juarez, Mexico August 10, 2020. REUTERS/Jose Luis Gonzalez

Students take part in an exam to enter the new high school academic year, with social distancing measures, as the outbreak of the coronavirus disease (COVID-19) continues, in Ciudad Juarez, Mexico August 10, 2020. REUTERS/Jose Luis Gonzalez

A teacher checks the body temperature of a student arriving for an exam to enter the new high school academic year, with social distancing measures, as the outbreak of the coronavirus disease (COVID-19) continues, in Ciudad Juarez, Mexico August 10, 2020. REUTERS/Jose Luis Gonzalez

Students take part in an exam to enter the new high school academic year, with social distancing measures, as the outbreak of the coronavirus disease (COVID-19) continues, in Ciudad Juarez, Mexico August 10, 2020. REUTERS/Jose Luis Gonzalez

A Maasai tour guide wears a face mask and rubber gloves as a preventive measure against the spread of coronavirus disease (COVID-19), during the wildebeests' (Connochaetes taurinus) migration, between the Maasai Mara game reserve and the open plains of the Serengeti, southwest of Nairobi, in the Maasai Mara game reserve, Kenya August 9, 2020. Picture taken August 9, 2020. REUTERS/Thomas Mukoya

A supporter of Alvaro Uribe, former president and legislator of Colombia, wearing a face mask, holds a flag that reads "We are with Uribe" during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

A sign that reads "Uribe in freedom" is seen on the car window during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

A supporter of Alvaro Uribe, former president and legislator of Colombia, wearing a face mask, waves a Colombian flag during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

A supporter of Alvaro Uribe, former president and legislator of Colombia, wearing a face mask, waves a Colombian flag during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

A supporter of Alvaro Uribe, former president and legislator of Colombia, wearing a face mask, holds a sign that reads "Uribe in freedom" during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

A supporter of Alvaro Uribe, former president and legislator of Colombia, wearing a face mask, reacts during a protest against the house arrest measure ordered by the Supreme Court of Justice against the former president in Bogota, Colombia, August 7, 2020. REUTERS/Luisa Gonzalez

A supporter of Alvaro Uribe, former president and legislator of Colombia, wearing a face mask, holds a sign that reads "Uribe in freedom" during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

A sign that reads "Uribe friend, Colombia is with you" is seen on the back of a car during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

A supporter of Alvaro Uribe, former president and legislator of Colombia, wearing a face mask, holds a sign that reads "Uribe in freedom" during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

A supporter of Alvaro Uribe, former president and legislator of Colombia, wearing a face mask, waves a Colombian flag during a protest against the house arrest measure ordered by the Supreme Court of Justice, against the former president in Bogota, Colombia August 7, 2020. REUTERS/Luisa Gonzalez

People are placed in the middle of the street by security forces in the low income neighbourhood of Petare as a punishment for disrespecting social distancing measures, amid the outbreak of the coronavirus disease (COVID-19), in Caracas, Venezuela August 5, 2020. Picture taken August 5, 2020. REUTERS/Manaure Quintero

A man watches as people are placed in the middle of the street by security forces in the low income neighbourhood of Petare as a punishment for disrespecting social distancing, measures amid the outbreak of the coronavirus disease (COVID-19), in Caracas, Venezuela August 5, 2020. Picture taken August 5, 2020. REUTERS/Manaure Quintero

A man holding a backpack with an image of the eyes of late president Hugo Chavez walks off the punishment area set by security forces for people who disrespect social distancing measures, in the low income neighbourhood of Petare, amid the outbreak of the coronavirus disease (COVID-19), in Caracas, Venezuela August 5, 2020. Picture taken August 5, 2020. REUTERS/Manaure Quintero

People are placed in the middle of the street by security forces in the low income neighbourhood of Petare as a punishment for disrespecting social distancing measures, amid the outbreak of the coronavirus disease (COVID-19), in Caracas, Venezuela August 5, 2020. Picture taken August 5, 2020. REUTERS/Manaure Quintero

A member of Venezuela's Bolivarian National Guard stands among people placed in the middle of the street in the low income neighbourhood of Petare as a punishment for disrespecting social distancing measures, amid the outbreak of the coronavirus disease (COVID-19), in Caracas, Venezuela August 5, 2020. Picture taken August 5, 2020. REUTERS/Manaure Quintero

People are placed in the middle of the street by security forces in the low income neighbourhood of Petare as a punishment for disrespecting social distancing measures, amid the outbreak of the coronavirus disease (COVID-19), in Caracas, Venezuela August 5, 2020. Picture taken August 5, 2020. REUTERS/Manaure Quintero

Drivers join a car caravan at a protest by Uber and Lyft drivers against the upcoming California Proposition 22 ballot measure, which would exempt rideshare companies from classifying their drivers as employees, in Los Angeles, California, U.S., August 6, 2020. REUTERS/Lucy Nicholson

Rideshare driver Peter Hong, 67, joins a car caravan at a protest by Uber and Lyft drivers against the upcoming California Proposition 22 ballot measure, which would exempt rideshare companies from classifying their drivers as employees, in Los Angeles, California, U.S., August 6, 2020. REUTERS/Lucy Nicholson

Soldiers are seen during a protest against Senator Samuel Garcia's proposal to close down the Mexican state oil firm Pemex's Cadereyta refinery as a measure to lower the levels of pollution in the air, in Cadereyta on the outskirts of Monterrey, Mexico August 6, 2020. REUTERS/Daniel Becerril

Soldiers are seen during a protest against Senator Samuel Garcia's proposal to close down the Mexican state oil firm Pemex's Cadereyta refinery as a measure to lower the levels of pollution in the air, in Cadereyta on the outskirts of Monterrey, Mexico August 6, 2020. REUTERS/Daniel Becerril

A worker of the Mexican state oil firm PEMEX is pictured during a protest against Senator Samuel Garcia's proposal to close down the Cadereyta refinery as a measure to lower the levels of pollution in the air, in Cadereyta on the outskirts of Monterrey, Mexico August 6, 2020. REUTERS/Daniel Becerril

The logo of the Mexican state oil firm PEMEX is pictured during a protest against Senator Samuel Garcia's proposal to close down the Cadereyta refinery as a measure to lower the levels of pollution in the air, in Cadereyta on the outskirts of Monterrey, Mexico August 6, 2020. REUTERS/Daniel Becerril

Workers of the Mexican state oil firm PEMEX protest against Senator Samuel Garcia's proposal to close down the Cadereyta refinery as a measure to lower the levels of pollution in the air, in Cadereyta on the outskirts of Monterrey, Mexico August 6, 2020. Banners read: "Oil workers always working for the welfare of Mexico" and "Out Samuel". REUTERS/Daniel Becerril

Workers of the Mexican state oil firm PEMEX protest against Senator Samuel Garcia's proposal to close down the Cadereyta refinery as a measure to lower the levels of pollution in the air, in Cadereyta on the outskirts of Monterrey, Mexico August 6, 2020. REUTERS/Daniel Becerril

Workers of the Mexican state oil firm PEMEX protest against Senator Samuel Garcia's proposal to close down the Cadereyta refinery as a measure to lower the levels of pollution in the air, in Cadereyta on the outskirts of Monterrey, Mexico August 6, 2020. REUTERS/Daniel Becerril

Florian Mehler poses for a picture during an interview with Reuters looking at the issues of binational couples separated by coronavirus measures who are trying to get regulations changed so they can meet again in person, in Wiesloch, Germany, August 3, 2020. Picture taken August 3, 2020. REUTERS/Tilman Blasshofer

Florian Mehler talks to his partner Renata Alves, who lives in Recife Brazil, during an interview with Reuters looking at the issues of binational couples separated by coronavirus measures who are trying to get regulations changed so they can meet again in person, in Wiesloch, Germany, August 3, 2020. Picture taken on August 3, 2020. REUTERS/Tilman Blasshofer

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

A goldfish bowl-like acrylic screen used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, is installed at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato

Goldfish bowl-like acrylic screens used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, are installed at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato

Goldfish bowl-like acrylic screens used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, are installed at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato TPX IMAGES OF THE DAY

A female staff wearing acrylic face shied is seen next to goldfish bowl-like acrylic screens used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato

A female staff wearing acrylic face shied is seen next to a goldfish bowl-like acrylic screen used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato

Goldfish bowl-like acrylic screens used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, are installed at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato

Goldfish bowl-like acrylic screens used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, are installed at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato

Goldfish bowl-like acrylic screens used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, are installed at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato

Goldfish bowl-like acrylic screens used as part of new social distancing measures and prevention of infection against the coronavirus disease (COVID-19), where male customers sit inside the screens to be entertained by female staff, are installed at Jazz Lounge Encounter, a form of a night club for seeking encounters, at Ginza district in Tokyo, Japan August 6, 2020. REUTERS/Issei Kato

Union member Erik Ramos wears a mask as he supports grocery workers protesting against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake TPX IMAGES OF THE DAY

Union member Erik Ramos wears a mask as he supports grocery workers protesting against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

A shopper uses his phone as grocery workers protest against Kroger, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

Shoppers leave with their purchases as grocery workers protest against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

A shopper leaves with his purchases as grocery workers protest against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

Grocery workers hold placards during a protest against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

Grocery workers hold placards and raise their fists during a protest against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

A grocery worker holds a placard during a protest against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

A grocery worker takes part in a protest against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

A grocery worker holds a placard during protest against Kroger, the parent company of Food 4 Less, to demand that safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake

Grocery workers gather to protest against Kroger, the parent company of Food 4 Less, to ensure safety measures get enforced inside stores during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., August 5, 2020. REUTERS/Mike Blake