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. India recorded more than 400,000 new COVID-19 cases for the first time on Saturday as it battles a devastating second wave, and the country's massive new vaccination drive was hampered in some areas by shortages of the shots. REUTERS/Adnan Abidi

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. Authorities reported 401,993 new cases in the previous 24 hours, after 10 consecutive days of more than 300,000 daily cases. REUTERS/Adnan Abidi

Manisha Bashu presses the chest of her father, who is suffering from breathing problem, after he felt unconscious 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. Deaths jumped by 3,523, taking the country's total toll to 211,853, according to the federal health ministry. REUTERS/Adnan Abidi

A volunteer uses an oximeter to check the oxygen level of a man before providing oxygen support for free, amidst the spread of coronavirus disease (COVID-19), outside a Gurudwara (Sikh temple) in Ghaziabad, India, April 30, 2021. REUTERS/Adnan Abidi

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. REUTERS/Adnan Abidi

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