Funeral workers remove empty coffins that held remains that were later cremated at La Recoleta cemetery in Santiago, Chile, Tuesday, April 20, 2021, during the coronavirus pandemic. (AP Photo/Esteban Felix)

Alejandra poses with her vaccination card after getting her second Moderna COVID-19 shot Monday April 19, 2021, in Pasadena, Texas. Alejandra, a dentist who also lives in Monterrey, Mexico, said she decided to seek a vaccine in the U.S. shortly after losing her mother to COVID-19 in February. Many people with the means from Latin America are traveling thousands of miles to get the COVID-19 vaccine in the United States because supplies are limited in their own countries. (AP Photo/David J. Phillip)

People paint black crosses for the victims of the COVID-19 pandemic in Pilsudski Square, Warsaw, Poland, Saturday, April 10, 2021. Almost 56,000 people have died of COVID-19 in this nation of around 38 million. (AP Photo/Czarek Sokolowski)

FILE - In this April 17, 2021, file photo, people check in for a flight to Miami at Silvio Pettirossi Airport, in Luque, Paraguay. Vaccine seekers who can afford to travel are coming to the United States to avoid the long wait, including people who have come from as far as Paraguay. (AP Photo/Jorge Saenz, File)

People sit in a waiting room after receiving a dose of the Pfizer COVID-19 vaccine, at a vaccination center set at Rome's Cinecitta' film studios, Tuesday, April 20, 2021. (AP Photo/Andrew Medichini)

A man receives a dose of the Pfizer COVID-19 vaccine, at a vaccination center set at Rome's Cinecitta' film studios, Tuesday, April 20, 2021. (AP Photo/Andrew Medichini)

Exterior view of the European Medicines Agency, EMA, in Amsterdam's business district, Netherlands, Tuesday, April 20, 2021. Experts at the European Medicines Agency are preparing to present the conclusions of their investigation later on Tuesday into possible links between the Johnson & Johnson coronavirus vaccine and very rare cases of unusual clotting disorders detected in the U.S. (AP Photo/Peter Dejong)

Patients breathe from oxygen tanks as they wait for a bed to open in the COVID-19 treatment area of the hospital in Villa Elisa, Paraguay, Tuesday, April 20, 2021. (AP Photo/Jorge Saenz)

A Migrant worker arrives at a bus station to leave for his village following a six-day lockdown put into place to control the rising cases of coronavirus infections, in New Delhi, India, Tuesday, April 20, 2021. India recorded over 250,000 new infections and over 1,700 deaths in the past 24 hours alone, and the U.K. announced a travel ban on most visitors from the country this week. (AP Photo/Manish Swarup)

Migrant laborers sit in a bus to travel to their villages following a six-day lockdown put into place to control the rising cases of coronavirus infections, in New Delhi, India, Tuesday, April 20, 2021. India recorded over 250,000 new infections and over 1,700 deaths in the past 24 hours alone, and the U.K. announced a travel ban on most visitors from the country this week. (AP Photo/Manish Swarup)

Used security gear worn in the COVID-19 area overflows a trash can at Clinicas Hospital in San Lorenzo, Paraguay, Tuesday, April 20, 2021. (AP Photo/Jorge Saenz)

Women wearing face masks as a precaution against the coronavirus watch tulips at a park in Goyang, South Korea, Tuesday, April 20, 2021. The banner, bottom left, reads "One-way passage to overcome Corona 19 and 2 meters away." (AP Photo/Ahn Young-joon)