FILE - In this May 10, 2021, file photo, health workers and volunteers in personal protective suits wait to receive patients outside a COVID-19 hospital that was set up at a Sikh Gurdwara in New Delhi, India. The World Health Organization said Monday, May 10, that a worrisome variant was first detected in India may spread more easily. Scientists are still trying to figure out if it resulted in the terrifying surge of infections in the nation, and looking to see if this could this happen elsewhere. (AP Photo/Ishant Chauhan, File )

FILE - In this May 6, 2021, file photo, an Indian health worker checks body temperature of a man during a door-to-door survey being conducted as a precaution against COVID-19 in Hyderabad, India. The World Health Organization said Monday, May 10, that a worrisome variant was first detected in India may spread more easily. Scientists are still trying to figure out if it resulted in the terrifying surge of infections in the nation, and looking to see if this could this happen elsewhere. (AP Photo/Mahesh Kumar A., File)

FILE - In this April 12, 2021, file photo, health worker collects nasal swab samples at a COVID-19 testing center in Hyderabad, India. The World Health Organization said Monday, May 10, that a worrisome variant was first detected in India may spread more easily. Scientists are still trying to figure out if it resulted in the terrifying surge of infections in the nation, and looking to see if this could this happen elsewhere. (AP Photo/Mahesh Kumar A., File)

FILE - In this May 10, 2021, file photo, a man places wooden logs on the pyre during the cremation of people who died of COVID-19 at the Seemapuri crematorium in New Delhi, India. The World Health Organization said Monday, May 10, that a worrisome variant was first detected in India may spread more easily. Scientists are still trying to figure out if it resulted in the terrifying surge of infections in the nation, and looking to see if this could this happen elsewhere. (AP Photo/Ishant Chauhan, File)

FILE - In this May 6, 2021, file photo, a health worker takes a nasal swab sample of a person to test for COVID-19 as others wait for their turn outside a field hospital in Mumbai, India. The World Health Organization said Monday, May 10, that a worrisome variant was first detected in India may spread more easily. Scientists are still trying to figure out if it resulted in the terrifying surge of infections in the nation, and looking to see if this could this happen elsewhere. (AP Photo/Rajanish Kakade, File)

FILE - In this May 4, 2021, file photo, a laborer works on a truck at a vegetable market in Jammu, India. The World Health Organization said Monday, May 10, that a worrisome variant was first detected in India may spread more easily. Scientists are still trying to figure out if it resulted in the terrifying surge of infections in the nation, and looking to see if this could this happen elsewhere. (AP Photo/Channi Anand, File)

FILE - In this April 25, 2021, file photo, people wearing masks as a precaution against the coronavirus wait to test for COVID-19 at a government hospital in Hyderabad, India. The World Health Organization said Monday, May 10, that a worrisome variant was first detected in India may spread more easily. Scientists are still trying to figure out if it resulted in the terrifying surge of infections in the nation, and looking to see if this could this happen elsewhere. (AP Photo/Mahesh Kumar A.)

FILE - In this May 3, 2021, file photo, a health worker takes a nasal swab sample of a woman to test for COVID-19 in Hyderabad, India. The World Health Organization said Monday, May 10, that a worrisome variant was first detected in India may spread more easily. Scientists are still trying to figure out if it resulted in the terrifying surge of infections in the nation, and looking to see if this could this happen elsewhere. (AP Photo/Mahesh Kumar A., File)