A man smokes during the coronavirus disease (COVID-19) pandemic in Pontevedra while the regional government of Galicia prohibits smoking without keeping a safe distance, in Spain, August 13, 2020. REUTERS/Miguel Vidal

Democratic presidential candidate and former Vice President Joe Biden, his wife Jill Biden, vice presidential candidate Senator Kamala Harris and her husband Douglas Emhoff pose keeping social distance after a campaign event, their first joint appearance since Biden named Harris as his running mate, at Alexis Dupont High School in Wilmington, Delaware, U.S., August 12, 2020. REUTERS/Carlos Barria TPX IMAGES OF THE DAY

A swan sits next to a social distancing marker during hot weather in Bowness-on-Windermere, Britain August 12, 2020. REUTERS/Jason Cairnduff

A social distance marker lies on the floor of Bonn's Freiherr-vom-Stein secondary school as classes resume in the federal state of North Rhine-Westphalia (NRW) during the ongoing COVID-19 pandemic following six weeks of summer holidays in Bonn, Germany, August 12, 2020. REUTERS/Wolfgang Rattay

People wait to cast their votes as they queue while keeping social distance outside a polling station during the second day of Egypt's senate elections in Cairo, August 12, 2020. REUTERS/Amr Abdallah Dalsh

Students of the 7th grade of Bonn's Freiherr-vom-Stein secondary school walk closer than the distance markers taped on the floor as school resumes in the federal state of North Rhine-Westphalia (NRW) during the ongoing spread of COVID-19 following six weeks of summer holidays in Bonn, Germany, August 12, 2020. REUTERS/Wolfgang Rattay

People wait to cast their votes as they queue while keeping social distance outside a polling station during the second day of Egypt's senate elections in Cairo, August 12, 2020. REUTERS/Amr Abdallah Dalsh

People wait to cast their votes as they queue while keeping social distance outside a polling station during the second day of Egypt's senate elections in Cairo, August 12, 2020. REUTERS/Amr Abdallah Dalsh

People wearing face masks wait to cast their votes as they queue while keeping social distance outside a polling station during the second day of Egypt's senate elections in Cairo, August 12, 2020. REUTERS/Amr Abdallah Dalsh

People wait to cast their votes as they queue while keeping social distance outside a polling station during the second day of Egypt's senate elections in Cairo, August 12, 2020. REUTERS/Amr Abdallah Dalsh

People wait to cast their votes as they queue while keeping social distance outside a polling station during the second day of Egypt's senate elections in Cairo, August 12, 2020. REUTERS/Amr Abdallah Dalsh

Swimmers walk downstairs towards the sea past Blackrock Diving Tower as it is closed until further notice due to issues with maintaining social distancing at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

A sign showing 'no entry' is seen at Blackrock Diving Tower as it is closed until further notice due to issues with maintaining social distancing at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

Lifeguards within protective barriers monitor swimmers and Blackrock Diving Tower, which has been closed today until further notice due to issues with maintaining social distancing, at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

Lifeguards within protective barriers monitor swimmers and Blackrock Diving Tower, which has been closed today until further notice due to issues with maintaining social distancing, at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

Swimmers sit in the sun as a social distancing notice to keep 2 metres apart is seen on the ground at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

Blackrock Diving Tower is seen with a lifeguards flag as it is closed until further notice due to issues with maintaining social distancing at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

Lifeguards within protective barriers monitor swimmers and Blackrock Diving Tower, which has been closed today until further notice due to issues with maintaining social distancing, at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

Lifeguards within protective barriers monitor swimmers and Blackrock diving tower, which has been closed today until further notice due to issues with maintaining social distancing, at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

Swimmers sit in the sun as a social distancing notice to keep 2 metres apart is seen on the ground at Salthill beach, amid the coronavirus disease (COVID-19) outbreak, in Galway, Ireland, August 11, 2020. REUTERS/Clodagh Kilcoyne

Palestinian students practicing social distancing as a new school year partially begins amid concerns about the spread of the coronavirus disease (COVID-19), near Tubas in the Israeli-occupied West Bank August 11, 2020. REUTERS/Raneen Sawafta

Jon Kaddish, Visitor Experience Operations Manager, holds social distancing signage near a replica of the Apollo 11 Lunar Module, ahead of the reopening of the Science Museum, after lockdown restrictions were eased following the outbreak of the coronavirus disease (COVID-19), London, Britain, August 10, 2020. Picture taken on August 10, 2020. REUTERS/Toby Melville

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

Assistant principal Sauveur Louissaint, wearing a face mask, to prevent the spread of the coronavirus disease (COVID-19), checks that pupils keep social distance at a classroom during the first day of school after holidays, at Lycee National de Petion Ville, in Port au Prince, Haiti August 10, 2020. REUTERS/Andres Martinez Casares

A woman walks past a closed shop covered in social distancing signs following the outbreak of the coronavirus disease (COVID-19) in Chester, Britain, August 10, 2020. REUTERS/Phil Noble

Shoppers walk past a social distancing sign following the outbreak of the coronavirus disease (COVID-19) in Chester, Britain, August 10, 2020. REUTERS/Phil Noble

First Minister of Scotland Nicola Sturgeon stands in the canteen with social distancing markers on the floor as she visits West Calder High School amid the coronavirus disease (COVID-19) outbreak, in West Calder, Scotland, Britain August 10, 2020. Andy Buchanan/Pool via REUTERS

First Minister of Scotland Nicola Sturgeon stands in the canteen with social distancing markers on the floor as she visits West Calder High School amid the coronavirus disease (COVID-19) outbreak, in West Calder, Scotland, Britain August 10, 2020. Andy Buchanan/Pool via REUTERS

First Minister of Scotland Nicola Sturgeon stands in the canteen with social distancing markers on the floor as she visits West Calder High School amid the coronavirus disease (COVID-19) outbreak, in West Calder, Scotland, Britain August 10, 2020. Andy Buchanan/Pool via REUTERS

First Minister of Scotland Nicola Sturgeon stands in the canteen with social distancing markers on the floor as she visits West Calder High School in West Calder, Scotland amid the coronavirus disease (COVID-19) outbreak, in Britain August 10, 2020. Andy Buchanan/Pool via REUTERS

A sign advising to keep social distance is seen at the protestant high school "Zum Grauen Kloster", on the first day of classes after the summer holidays, amid the coronavirus disease (COVID-19) pandemic, in Berlin, Germany, August 10, 2020. REUTERS/Fabrizio Bensch

Workers build a temporary classroom structure, so students can maintain social distancing during the coronavirus disease (COVID-19) pandemic, at Rice University in Houston, Texas, U.S., August 7, 2020. REUTERS/Adrees Latif

The U.S. Mexico border wall can be seen in the distance near an unfinished cross-border tunnel found by Immigration and Customs Enforcement (ICE) officers in the sandy Sonoran desert terrain in San Luis, Arizona, U.S., August 7, 2020. REUTERS/Mike Blake

The U.S. Mexico border wall can be seen in the distance near an unfinished cross-border tunnel found by Immigration and Customs Enforcement (ICE) officers in the sandy Sonoran desert terrain in San Luis, Arizona, U.S., August 7, 2020. REUTERS/Mike Blake

The U.S. Mexico border wall can be seen in the distance near an unfinished cross-border tunnel found by Immigration and Customs Enforcement (ICE) officers in the sandy Sonoran desert terrain in San Luis, Arizona, U.S., August 7, 2020. REUTERS/Mike Blake

A worker walks past a temporary classroom structure under construction, so students can maintain social distancing during the coronavirus disease (COVID-19) pandemic, at Rice University in Houston, Texas, U.S., August 7, 2020. REUTERS/Adrees Latif

Workers build a temporary classroom structure, so students can maintain social distancing during the coronavirus disease (COVID-19) pandemic, at Rice University in Houston, Texas, U.S., August 7, 2020. REUTERS/Adrees Latif

Workers install insulation in the ceiling of a temporary classroom structure under construction, so students can maintain social distancing during the coronavirus disease (COVID-19) pandemic, at Rice University in Houston, Texas, U.S., August 7, 2020. REUTERS/Adrees Latif

A worker guides an operator of a tractor digger during construction of a temporary classroom structures, so students can maintain social distancing during the coronavirus disease (COVID-19) pandemic, at Rice University in Houston, Texas, U.S., August 7, 2020. REUTERS/Adrees Latif

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

A social distancing sign is pictured at Bournemouth Beach, amid the coronavirus disease (COVID-19) outbreak, in Bournemouth, Britain, August 7, 2020. REUTERS/Toby Melville

People walk past a social distancing sign at Bournemouth Beach, amid the coronavirus disease (COVID-19) outbreak, in Bournemouth, Britain, August 7, 2020. REUTERS/Toby Melville

An actress dressed as a hummingbird performs on the streets, flapping her wings during a mayoral campaign to promote social distancing, amidst an outbreak of the coronavirus disease (COVID-19), in Bogota, Colombia August 6, 2020. REUTERS/Luisa Gonzalez

Actors dressed as hummingbirds perform on the streets, flapping their wings during a mayoral campaign to promote social distancing, amidst an outbreak of the coronavirus disease (COVID-19), in Bogota, Colombia August 6, 2020. REUTERS/Luisa Gonzalez

An actor dressed as a hummingbird performs on the streets, flapping his wings during a mayoral campaign to promote social distancing, amidst an outbreak of the coronavirus disease (COVID-19), in Bogota, Colombia August 6, 2020. REUTERS/Luisa Gonzalez

An actor dressed as a hummingbird performs on the streets, flapping his wings during a mayoral campaign to promote social distancing, amidst an outbreak of the coronavirus disease (COVID-19), in Bogota, Colombia August 6, 2020. REUTERS/Luisa Gonzalez

Actors dressed as hummingbirds perform on the streets, flapping their wings during a mayoral campaign to promote social distancing, amidst an outbreak of the coronavirus disease (COVID-19), in Bogota, Colombia August 6, 2020. REUTERS/Luisa Gonzalez

Actors dressed as hummingbirds walk the streets flapping their wings during a mayoral campaign to promote social distancing, amidst an outbreak of the coronavirus disease (COVID-19), in Bogota, Colombia August 6, 2020. REUTERS/Luisa Gonzalez

An actor dressed as a hummingbird performs on the streets, flapping his wings during a mayoral campaign to promote social distancing, amidst an outbreak of the coronavirus disease (COVID-19), in Bogota, Colombia August 6, 2020. REUTERS/Luisa Gonzalez