A woman receives a dose of COVISHIELD, a coronavirus disease (COVID-19) vaccine manufactured by Serum Institute of India, as others wait for their turn at a vaccination centre in Mumbai, India, April 26, 2021.

Manika Goel, sits next to her husband who is suffering from the coronavirus disease (COVID-19) inside the emergency ward at Holy Family hospital in New Delhi, India, April 29, 2021.

People with breathing problem receive oxygen support for free outside a Gurudwara (Sikh temple), amidst the spread of coronavirus disease (COVID-19), in Ghaziabad, India, April 30, 2021.

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.

People suffering from the coronavirus disease (COVID-19) are treated inside an overcrowded casualty ward at a hospital in New Delhi, India, May 1, 2021.

A man with a breathing problem receives oxygen support for free at a Gurudwara (Sikh temple), amidst the spread of coronavirus disease (COVID-19), in Ghaziabad, India, May 3, 2021.

Nanhe Pal, 52, who is suffering from breathing problem, receives oxygen support for free at a Gurudwara (Sikh temple), amidst the spread of coronavirus disease (COVID-19), in Ghaziabad, India, May 3, 2021.

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.

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. Image used for illustrative purpose

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.

A man walks past a notice that reads “No vaccination for 3 days as per Brihanmumbai Municipal Corporation (BMC) orders� pasted outside a coronavirus disease (COVID-19) vaccination centre in Mumbai, India, April 30, 2021.

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.

A policeman asks people who came to receive a dose of a coronavirus disease (COVID-19) vaccine to leave as they stand outside the gate of a vaccination centre which was closed due to unavailability of the supply of COVID-19 vaccine, in Mumbai, India, May 3, 2021.

People carry the father of Manisha Bashu towards an ambulance, after he felt unconsicous while receiving oxygen support for free at a Gurudwara (Sikh temple), amidst the spread of coronavirus disease (COVID-19), in Ghaziabad, India, April 30, 2021.

Family members of Nanhe Pal, 52, who is suffering from breathing problem, provides him oxygen support for free at a Gurudwara (Sikh temple), amidst the spread of coronavirus disease (COVID-19), in Ghaziabad, India, May 3, 2021.

A policewoman points to a notice about the shortage of vaccine for the coronavirus disease (COVID-19) as people arrive at a vaccination centre in Mumbai, India, April 28, 2021.

A woman with a breathing problem receives oxygen support for free at a Gurudwara (Sikh temple), amidst the spread of coronavirus disease (COVID-19), in Ghaziabad, India, April 30, 2021.

A volunteer uses a pulse oximeter to check the oxygen saturation of a man's blood before providing him oxygen support for free at a Gurudwara (Sikh temple), amidst the spread of coronavirus disease (COVID-19), in Ghaziabad, India, May 3, 2021.

A doctor checks an X-ray of a patient suffering from the coronavirus disease (COVID-19) inside a COVID-19 ward of a hospital in New Delhi, India, May 1, 2021. Image used for illustrative purpose

A private security guard stands outside an empty coronavirus disease (COVID-19) vaccination centre after Brihanmumbai Municipal Corporation (BMC) issued a notice about no vaccinations for three days, in Mumbai, India, April 30, 2021.

Rohit Gupta, 27 and Nandani Gupta, 42, receive their first dose of COVISHIELD, a coronavirus disease (COVID-19) vaccine manufactured by Serum Institute of India, at a vaccination centre in Mumbai, India, May 3, 2021.

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.