Combination picture of physiotherapist Ana Carolina Xavier of FamilyCare, a group specialising in mobile physiotherapy care, and who also works at the ICU of Lagoa-Barra field hospital for COVID-19 patients using an oxygen machine during her treatment after being diagnosed with the coronavirus disease (COVID-19) on June 25, 2020, and after she recovered and returned to work at the ICU, in Rio de Janeiro, Brazil July 2, 2020. Pictures taken on June 25, 2020, and July 2, 2020 (Bottom). REUTERS/Ricardo Moraes

Physiotherapist Ana Carolina Xavier of FamilyCare, a group specialising in mobile physiotherapy care, and who also works at the ICU of Lagoa-Barra field hospital for COVID-19 patients, uses an oxygen machine during her treatment after being diagnosed with the coronavirus disease (COVID-19), at her house in Rio de Janeiro, Brazil June 26, 2020. Picture taken June 26, 2020. REUTERS/Ricardo Moraes

Physiotherapist Ana Carolina Xavier of FamilyCare, a group specialising in mobile physiotherapy care, and who also works at the ICU of Lagoa-Barra field hospital for COVID-19 patients, uses an oxygen machine during her treatment after being diagnosed with the coronavirus disease (COVID-19), at her house in Rio de Janeiro, Brazil June 25, 2020. Picture taken June 25, 2020. REUTERS/Ricardo Moraes

Physiotherapist Ana Carolina Xavier of FamilyCare, a group specialising in mobile physiotherapy care, and who also works at the ICU of Lagoa-Barra field hospital for COVID-19 patients, uses an oxygen machine during her treatment after being diagnosed with the coronavirus disease (COVID-19), at her house in Rio de Janeiro, Brazil June 25, 2020. Picture taken June 25, 2020. REUTERS/Ricardo Moraes

A doctor wearing protective equipment shows a jar of cannabis oil, inside the Zerenia clinic, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

A nurse wearing a face mask is seen inside a Zerenia clinic medical office, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

A man wearing a face mask sits in the waiting room of the Zerenia clinic, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

Doctors wearing protective gear are seen at the reception of the Zerenia clinic, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

A doctor wearing protective gear talks to a patient inside a Zerenia clinic medical office, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

A woman wearing protective gear measures the body temperature of a man wearing a face mask at the entrance to the Zerenia clinic, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

A notice on a wall that says "Medical Cannabis, Mind Body and Spirit" is seen inside the Zerenia clinic, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

People wearing face masks walk in front of the Zerenia clinic, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

A doctor wearing protective gear is seen inside a medical office at the Zerenia Clinic, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

A doctor wearing protective equipment talks to a patient at the reception of the Zerenia clinic, the first clinic specializing in medical marijuana treatments, in Bogota, Colombia July 30, 2020. Picture taken July 30, 2020. REUTERS/Luisa Gonzalez

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

Cricket - Third Test - England v West Indies - Emirates Old Trafford, Manchester, Britain - July 26, 2020 West Indies' Shane Dowrich receives treatment, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) Martin Rickett/Pool via REUTERS

An employee looks at his mobile phone as he stands at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

A television cameraman films at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Picture taken July 22, 2020. REUTERS/Benoit Tessier

Water fills pools at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

An employee works in the control room of the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

Sam Azimi, deputy director of innovation at the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), speaks to members of media at the Marne Aval waste water treatment plant in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

An employee looks at his mobile phone as he stands at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

Pipes run at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

A pipe runs at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

A sample of water is pictured at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

An employee collects a sample of water at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

An employee collects a sample of water at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

Water fills pools at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

Water fills pools at the Marne Aval waste water treatment plant, operated by the Interdepartmental Sanitation Syndicate for the greater Paris metropolitan area (SIAAP), in Noisy-le-Grand, near Paris, France, July 22, 2020. Scientists study the Paris waste water to detect the concentration of COVID-19 traces as France remains vigilant against the spread of the coronavirus disease. Picture taken July 22, 2020. REUTERS/Benoit Tessier

Paramedics check persons with symptoms of the coronavirus disease (COVID-19) as they arrive for treatment to the emergency area of the Guatemalan Institute of Social Security (IGSS), in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

A paramedic helps a patient with symptoms of the coronavirus disease (COVID-19) while arriving to the emergency area of the Guatemalan Institute of Social Security (IGSS) for treatment, in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

Municipal firefighters disinfect themselves outside the emergency area of the Guatemalan Institute of Social Security (IGSS) after transporting a person with symptoms of the coronavirus disease (COVID-19) for treatment, in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

A man carries his wife, affected with a respiratory illness, towards the emergency area of the Guatemalan Institute of Social Security (IGSS) for treatment, as the coronavirus disease (COVID-19) outbreak continues, in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

A paramedic helps a man with symptoms of the coronavirus disease (COVID-19) while arriving for treatment at the emergency area of the Guatemalan Institute of Social Security (IGSS), in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

A man carries his wife, affected with a respiratory illness, towards the emergency area of the Guatemalan Institute of Social Security (IGSS) for treatment, as the coronavirus disease (COVID-19) outbreak continues, in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

Paramedics transport a person with symptoms of the coronavirus disease (COVID-19) for treatment outside the emergency area of the Guatemalan Institute of Social Security (IGSS), in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

Paramedics help a person with symptoms of the coronavirus disease (COVID-19) as they arrive for treatment to the emergency area of the Guatemalan Institute of Social Security (IGSS), in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

A municipal firefighter disinfects an ambulance outside the emergency area of the Guatemalan Institute of Social Security (IGSS) after transporting a person with symptoms of the coronavirus disease (COVID-19) for treatment, in Guatemala City, Guatemala July 21, 2020. REUTERS/Luis Echeverria

Parents of children who suffer from cancer wait to receive a treatment for their children at the Children's Hospital for Cancer Diseases, amid the spread of the coronavirus disease (COVID-19), in Basra, Iraq July 12, 2020. Picture taken July 12, 2020. REUTERS/Essam Al-Sudani

A child who suffers from cancer receives a treatment at the Children's Hospital for Cancer Diseases, amid the spread of the coronavirus disease (COVID-19), in Basra, Iraq July 9, 2020. Picture taken July 9, 2020. REUTERS/Essam Al-Sudani

A sanitation worker wearing personal protective equipment selects cleaning tools at the coronavirus treatment center at Fourah Bay College, amid the outbreak of the coronavirus disease (COVID-19), in Freetown, Sierra Leone July 2, 2020. Picture taken July 2, 2020. REUTERS/Cooper Inveen

Sanitation worker Francis Kamara disinfects his boots in a bucket of chlorine at the coronavirus treatment center at Fourah Bay College, amid the outbreak of the coronavirus disease (COVID-19) in Freetown Sierra Leone, on July 2, 2020. Picture taken July 2, 2020. REUTERS/Cooper Inveen

People attend Paris' LGBT march despite social distancing restrictions forbidding gatherings of more than 10 people in Paris, France, July 4, 2020. Banner reads " "PMA (Fertility treatment) for all". REUTERS/Charles Platiau

A woman takes part in a protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

People gather to protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

People gather to protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

People gather to protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

People gather to protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

People gather to protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

People gather to protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

People gather to protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

People gather to protest against the treatment of Ethiopia's ethnic Oromo group, outside Downing Street in London, Britain, July 3, 2020. REUTERS/Simon Dawson

Maria Geralda da Silva, 84, who is experiencing breathing difficulty and others symptoms of the coronavirus disease (COVID-19), receives oxygen from Emergency Rescue Service's (SAMU) Belisa Marcelino and Cristina Almeida as preparation is done to transfer her to a hospital for treatment amid the outbreak, in Sao Paulo, Brazil, July 2, 2020. REUTERS/Amanda Perobelli

Maria Geralda da Silva, 84, who is experiencing breathing difficulty and others symptoms of the coronavirus disease (COVID-19), is carried into an ambulance by first responders of the Emergency Rescue Service (SAMU) as she is transferred to a hospital for treatment amid the outbreak, in Sao Paulo, Brazil, July 2, 2020. REUTERS/Amanda Perobelli

Maria Geralda da Silva, 84, who is experiencing breathing difficulty and others symptoms of the coronavirus disease (COVID-19), is carried into an ambulance by first responders of the Emergency Rescue Service (SAMU) as she is transferred to a hospital for treatment amid the outbreak, in Sao Paulo, Brazil, July 2, 2020. REUTERS/Amanda Perobelli

Emergency Rescue Service (SAMU) nurse Belisa Marcelino talks to Maria Geralda da Silva, 84, who is experiencing breathing difficulty and others symptoms, inside an ambulance as the patient is transferred to a hospital for treatment, in Sao Paulo, Brazil, July 2, 2020. REUTERS/Amanda Perobelli