A person walks past a nature mural on Earth Day during the COVID-19 pandemic in Toronto, Thursday, April 22, 2021. (Nathan Denette/The Canadian Press via AP)

Texas-Rio Grande Valley's medical students help during a COVID-19 vaccination event at the medical school on Thursday, April 8,2021, in Edinburg, Texas. (Delcia Lopez/The Monitor via AP)

Laborers working to set up at COVID-19 field hospital in Mumbai, India, Thursday, April 22, 2021. New infections are rising faster in India than any other place in the world, stunning authorities and capsizing its fragile health system. (AP Photo/Rafiq Maqbool)

People wearing masks to help protect against the spread of coronavirus, walk along a busy street before a nationwide lockdown, in Ankara, Turkey, Thursday, April 22, 2021. Turkey has announced that it is extending an upcoming weekend lockdown to include a public holiday on Friday, as it grapples with soaring infections. The country has been posting record-high levels of infections and deaths since it eased COVID-19 restrictions in early March. The poster is depicting Turkey's founder Kemal Ataturk holding a child.(AP Photo/Burhan Ozbilici)

Women stand near an entrance of a squatters settlement to prevent more families from moving on to the hilltop in the Villa El Salvador neighborhood, occupied by people who can no longer pay their rent because of restrictions on economic activity aimed at limiting the spread of COVID-19, in Lima, Peru, Thursday, April 22, 2021. (AP Photo/Martin Mejia)

FILE - In this Tuesday, April 21, 2020 file photo, a volunteer for the Edible London food project checks and packs bananas to be put in food packs and delivered to residents who need it in the Haringey Council area, at a hub setup as a result of coronavirus inside the Alexandra Palace venue, in north London. A charity says U.K. food bank rose by a third during the past 12 months as the COVID-19 pandemic left more people without the money to buy basic necessities. The Trussell Trust said Thursday, April 22, 2021 that the food banks it works with handed out more than 2.5 million food parcels in the year through March, up from 1.9 million a year earlier. (AP Photo/Matt Dunham, File)

Lucas Christensen, right, helps Rodney Wegg pick up his wife, Kari, after she collapsed after visiting IU Health North Hospital for her second COVID shot in Carmel, Ind., on Monday, March 22, 2021. (AP Photo/Charles Rex Arbogast)

A COVID-19 patient does breathing exercises at the entrance of a tent set up to treat new coronavirus cases outside the Social Security Hospital, shortly before being released in Quito, Ecuador, Thursday, April 22, 2021. The government decreed new lockdown rules on April 21 for the majority of Ecuador's provinces, limiting movement on weeknights and an all-day curfew on weekends to curb the spread of the new coronavirus which is overwhelming hospitals. (AP Photo/Dolores Ochoa)

The body of a man who died from COVID-19 is prepared for a burial, at the Behesht-e-Zahra cemetery just outside Tehran, Iran, Wednesday, April 21, 2021. After facing criticism for downplaying the virus last year, authorities have put partial lockdowns and other measures in place to try and slow the coronavirus’ spread, as Iran faces what looks like its worst wave of the coronavirus pandemic yet. (AP Photo/Ebrahim Noroozi)

FILE - In this Feb. 8, 2021, file photo, Florida seniors have their temperatures taken before receiving the second dose of the Pfizer COVID-19 vaccine at Jackson Health System in Miami. COVID-19 hospitalizations are plunging among older Americans. The falling numbers show the country’s vaccination strategy is working, pushing deaths lower and easing pressure on the frayed hospital system. (AP Photo/Marta Lavandier, File)

A nurse prepares a dose of the AstraZeneca vaccine for COVID-19 while giving vaccination shots to residents at the Rommel Fernandez soccer stadium parking lot in Panama City, Thursday, April 22, 2021. (AP Photo/Arnulfo Franco)

A COVID-19 patient looks for a relative to bring him personal items, from inside a tent set up outside the Social Security Hospital where patients are being treated in Quito, Ecuador, Thursday, April 22, 2021. The government decreed new lockdown rules on April 21 for the majority of Ecuador's provinces, limiting movement on weeknights and an all-day curfew on weekends to curb the spread of the new coronavirus which is overwhelming hospitals. (AP Photo/Dolores Ochoa)