A medical worker collects a swab sample from a woman at a COVID-19 screening centre in Patna, India's Bihar state, on July 21, 2020. India's federal health ministry Wednesday morning said 648 new deaths due to COVID-19, besides fresh 37,724 positive cases, were reported during the past 24 hours across the country, taking the number of deaths to 28,732 and total cases to 1,192,915. (Photos: Str/Xinhua)

A medical worker collects a swab sample from a police officer at a COVID-19 screening centre in Patna, India's Bihar state, on July 21, 2020. India's federal health ministry Wednesday morning said 648 new deaths due to COVID-19, besides fresh 37,724 positive cases, were reported during the past 24 hours across the country, taking the number of deaths to 28,732 and total cases to 1,192,915.

A medical worker collects a swab sample from a woman at a COVID-19 screening centre in Patna, India's Bihar state, on July 21, 2020. India's federal health ministry Wednesday morning said 648 new deaths due to COVID-19, besides fresh 37,724 positive cases, were reported during the past 24 hours across the country, taking the number of deaths to 28,732 and total cases to 1,192,915.

Medical workers transfer a COVID-19 patient to a ward at the Nalanda Medical College and Hospital (NMCH) in Patna, India's Bihar state, on July 21, 2020. India's federal health ministry Wednesday morning said 648 new deaths due to COVID-19, besides fresh 37,724 positive cases, were reported during the past 24 hours across the country, taking the number of deaths to 28,732 and total cases to 1,192,915.