Roshan Lal, 48, a villager with a breathing difficulty rests in a cot as he receives treatment at a makeshift open-air clinic, amidst the spread of the coronavirus disease (COVID-19), in Mewla Gopalgarh village, in Jewar district, in the northern state of Uttar Pradesh, India, May 16, 2021. Picture taken May 16, 2021. REUTERS/Danish Siddiqui

Harveer Singh, 65, a villager suffering from COVID-19 sits in a cot as he receives treatment at a makeshift open-air clinic, amidst the spread of the coronavirus disease (COVID-19), in Mewla Gopalgarh village, in Jewar district, in the northern state of Uttar Pradesh, India, May 16, 2021. Picture taken May 16, 2021. REUTERS/Danish Siddiqui

Harveer Singh, 65, a villager suffering from COVID-19 rests in a cot as he receives treatment at a makeshift open-air clinic, amidst the spread of the coronavirus disease (COVID-19), in Mewla Gopalgarh village, in Jewar district, in the northern state of Uttar Pradesh, India, May 16, 2021. Picture taken May 16, 2021. REUTERS/Danish Siddiqui

Harveer Singh, 65, a villager suffering from COVID-19 rests in a cot as he receives treatment at a makeshift open-air clinic, amidst the spread of the coronavirus disease (COVID-19), in Mewla Gopalgarh village, in Jewar district, in the northern state of Uttar Pradesh, India, May 16, 2021. Picture taken May 16, 2021. REUTERS/Danish Siddiqui

Villagers with breathing difficulties rest in cots as they receive treatment at a makeshift open-air clinic, amidst the spread of the coronavirus disease (COVID-19), in Mewla Gopalgarh village in Jewar district, in the northern state of Uttar Pradesh, India, May 16, 2021. Picture taken May 16, 2021. REUTERS/Danish Siddiqui

Villagers with breathing difficulties rest in cots as they receive treatment at a makeshift open-air clinic, amidst the spread of the coronavirus disease (COVID-19), in Mewla Gopalgarh village in Jewar district in the northern state of Uttar Pradesh, India, May 16, 2021. Picture taken May 16, 2021. REUTERS/Danish Siddiqui

A man gets his pre-treatment consultation at a vaccination center that offers vaccinations with the AstraZeneca vaccine as the number of the coronavirus disease (COVID-19) infections decreases in Munich, Germany, May 13, 2021. REUTERS/Andreas Gebert

Relatives carry Bhagirath Singh, 77, who is experiencing breathing problems, to a government-run hospital for treatment, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui REFILE - CORRECTING FIRST NAME AND AGE

A woman receives treatment inside a COVID-19 ward of a government-run hospital, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui

Relatives help Jagdish Singh, 57, out of an ambulance outside a government-run hospital to receive treatment, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui

Patients receive treatment inside a COVID-19 ward of a government-run hospital, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

A patient receives treatment inside a COVID-19 ward of a government-run hospital, amidst the spread of the coronavirus disease (COVID-19), in Bijnor district, in the northern state of Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui

Relatives carry Bhagirath Singh, 77, who is experiencing breathing problems, to a government-run hospital for treatment, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui REFILE - CORRECTING FIRST NAME AND AGE

A woman with breathing problems waits for treatment at a health centre, amidst the coronavirus disease (COVID-19) pandemic, in Muzaffarnagar, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui

A man experiencing breathing problems lies on a stretcher as he waits for treatment inside an emergency ward of a government-run hospital, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui

A patient receives treatment inside a COVID-19 ward of a government-run hospital, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui

Jagdish Singh, 57, a man experiencing breathing problems, sits inside an ambulance waiting to enter a government-run hospital for treatment, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui

Relatives carry a man for treatment inside an emergency ward of a government-run hospital, amidst the coronavirus disease (COVID-19) pandemic, in Bijnor district, Uttar Pradesh, India, May 11, 2021. REUTERS/Danish Siddiqui

Geetika, 45, who is suffering from coronavirus disease (COVID-19), receives treatment as a Syringe Infusion Pump, donated by France is seen next to her bed, inside the emergency room of Safdarjung Hospital in New Delhi, India, May 7, 2021. REUTERS/Adnan Abidi

Geetika, 45, who is suffering from coronavirus disease (COVID-19), gestures as she receives treatment inside the emergency room of Safdarjung Hospital in New Delhi, India, May 7, 2021. REUTERS/Adnan Abidi

A man suffering from coronavirus disease (COVID-19) receives treatment as a Syringe Infusion Pump, donated by France is seen next to his bed, inside the emergency room of Safdarjung Hospital in New Delhi, India, May 7, 2021. REUTERS/Adnan Abidi

A man suffering from coronavirus disease (COVID-19), receives treatment as a Syringe Infusion Pump, donated by France is seen next to his bed, inside the emergency room of Safdarjung Hospital in New Delhi, India, May 7, 2021. REUTERS/Adnan Abidi

A man suffering from coronavirus disease (COVID-19) receives treatment as a Syringe Infusion Pump, donated by France is seen next to his bed, inside the emergency room of Safdarjung Hospital in New Delhi, India, May 7, 2021. REUTERS/Adnan Abidi

Demonstrators, including Zami Uyghur (R) and her 4-year-old son (whom she preferred not to name), hold a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkistan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Demonstrators, including Aziz Sulayman, hold a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkistan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Demonstrators hold a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkistan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Demonstrators, including Aziz Sulayman, hold a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkistan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Ali Jan takes part in a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkistan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Demonstrators hold a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkistan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Demonstrators, including Aziz Sulayman (L), hold a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkistan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Setiwaldi Abdukadir takes part in a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkestan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Jamal Rehi takes part in a protest in front of the U.S. State Department to commemorate Uyghur Doppa Day and to urge the U.S. and the international community to take action against China's treatment of the Uyghur people in the East Turkestan (Xinjiang) region, in Washington, U.S. May 5, 2021. REUTERS/Leah Millis

Lilaben Gautambhai Modi, 80, wearing an oxygen mask, sits inside an ambulance as she waits to enter a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19), in Ahmedabad, India, May 5, 2021. REUTERS/Amit Dave

Healthcare workers and relatives carry a woman from an ambulance for treatment at a COVID-19 care facility, amidst the spread of the coronavirus disease (COVID-19) in Mumbai, India, May 4, 2021. REUTERS/Niharika Kulkarni

Relatives of a woman suffering from the coronavirus disease (COVID-19), carry an oxygen cylinder as she receives treatment in the emergency room of Holy Family Hospital in New Delhi, India, May 1, 2021. REUTERS/Danish Siddiqui SEARCH "SIDDIQUI AGGARWAL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A patient suffering from the coronavirus disease (COVID-19) receives treatment inside the casualty ward at a hospital in New Delhi, India, May 1, 2021. REUTERS/Danish Siddiqui

A patient suffering from the coronavirus disease (COVID-19) receives treatment inside the casualty ward at a hospital in New Delhi, India, May 1, 2021. REUTERS/Danish Siddiqui

A man suffering from the coronavirus disease (COVID-19) is comforted by his daughter as he receives treatment inside the casualty ward at a hospital in New Delhi, India, May 1, 2021. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

Vijay Gupta, 62, with breathing problem, sits inside a car as he waits to get admission at a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 1, 2021. REUTERS/Danish Siddiqui

Vijay Gupta, 62, with breathing problem, sits inside a car as he waits to get admission at a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 1, 2021. REUTERS/Danish Siddiqui

A wounded man transferred from Logar province after a bomb blast receives treatment at a hospital in Kabul, Afghanistan May, 1, 2021. REUTERS/Omar Sobhani

A wounded man transferred from Logar province after a bomb blast receives treatment at a hospital in Kabul, Afghanistan May, 1, 2021. REUTERS/Omar Sobhani

A wounded man transferred from Logar province after a bomb blast receives treatment at a hospital in Kabul, Afghanistan May, 1, 2021. REUTERS/Omar Sobhani

Ankita Patel, a 31-year-old paramedic, adjusts the oxygen mask of a woman inside an ambulance waiting to enter a coronavirus disease (COVID-19) hospital for treatment, amidst the spread of COVID-19 in Ahmedabad, India, April 29, 2021. Picture taken April 29, 2021. REUTERS/Amit Dave

A patient suffering from the coronavirus disease (COVID-19) receives treatment inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021. REUTERS/Danish Siddiqui

A patient suffering from the coronavirus disease (COVID-19) receives treatment inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021. REUTERS/Danish Siddiqui

Patients suffering from the coronavirus disease (COVID-19) receive treatment inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021. REUTERS/Danish Siddiqui

A patient suffering from the coronavirus disease (COVID-19) receives treatment inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021. REUTERS/Danish Siddiqui

A patient suffering from the coronavirus disease (COVID-19) receives treatment inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

A patient suffering from the coronavirus disease (COVID-19) receives treatment inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021. REUTERS/Danish Siddiqui

Patients suffering from the coronavirus disease (COVID-19) receive treatment inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

Patients suffering from the coronavirus disease (COVID-19) receive treatment inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021. REUTERS/Danish Siddiqui

Madhuriben S Parmar reacts with an oxygen mask on as she speaks to her family on a video call while lying in an ambulance waiting to enter a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19) in Ahmedabad, India, April 28, 2021. REUTERS/Amit Dave

Healthcare workers and relatives carry Shashikantbhai Parekh, a patient with breathing problem, out from an ambulance for treatment at a COVID-19 hospital, amidst the spread of the coronavirus disease (COVID-19) in Ahmedabad, India, April 28, 2021. REUTERS/Amit Dave

The husband of Nanduba Chavda adjusts his wife's oxygen mask as they wait in a car to enter a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19) in Ahmedabad, India, April 28, 2021. REUTERS/Amit Dave

Aminbanu Memon wearing an oxygen mask sits in an autorickshaw waiting to enter a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19) in Ahmedabad, India, April 28, 2021. REUTERS/Amit Dave

A woman with breathing problem waits inside an ambulance for her turn to enter a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19) in Ahmedabad, India, April 28, 2021. REUTERS/Amit Dave

A patient wearing an oxygen mask is wheeled inside a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19) in Ahmedabad, India, April 26, 2021. REUTERS/Amit Dave

A woman lies in the back of a load carrier waiting to enter a COVID-19 hospital for treatment, amidst the spread of the coronavirus disease (COVID-19), in Ahmedabad, India, April 26, 2021. REUTERS/Amit Dave