Leanna Arcila, 7, is licked by Watson, a therapy dog with the Pawtucket police department, as she receives her COVID-19 vaccination from Dr. Eugenio Fernandez at Nathanael Greene Elementary School in Pawtucket, R.I., Tuesday, December 7, 2021. Even as the U.S. reaches a COVID-19 milestone of roughly 200 million fully-vaccinated people, infections and hospitalizations are spiking, including in highly-vaccinated pockets of the country like New England. (Photo by David Goldman/AP Photo)

A cleaning staff waers protective gear to disinfect a metro carriage as a prevemtive measure against the spreading of the COVID-19 coronavirus in Addis Ababa, Ethiopia, on March 20, 2020. African countries have been among the last to be hit by the global COVID-19 coronavirus epidemic but as cases rise, many nations are now taking strict measures to block the deadly illness. (Photo by Michael Tewelde/AFP Photo)

Border guard officers, wearing masks against COVID-19 infection adjust their outfits before a distinguished service awards ceremony for employees of the interior ministry in Bucharest, Romania, Thursday, July 16, 2020. Romania has registered on Thursday the highest number of COVID-19 infection cases since the pandemic reached the country in February, 777 in a 24 hours interval, as many fail to observe the mandatory protection measures, like the use of a face mask indoors or maintaining social distancing. (Photo by Andreea Alexandru/AP Photo)

A woman uses a face masks as a preventive measure against the spread of the new coronavirus, COVID-19, in Bogota, on March 19, 2020. Colombia will block all international flights from Monday for 30 days, President Ivan Duque announced on Thursday. (Photo by Raul Arboleda/AFP Photo)

A Palestinian man waves from his home as a clown and a man in a costume perform to entertain people amid concerns about the spread of the coronavirus disease (COVID-19), in Khan Younis in the southern Gaza Strip on April 19, 2020. (Photo by Ibraheem Abu Mustafa/Reuters)

A serviceman of Russia's Emergencies Ministry wearing protective gear disinfects Moscow's Leningradsky railway station on May 19, 2020, amid the COVID-19 coronavirus pandemic. (Photo by Kirill Kudryavtsev/AFP Photo)

A man dressed as a bear and wearing a protective face mask amid the outbreak of the coronavirus disease (COVID-19) stands in front of a fountain in central Kyiv, Ukraine on August 11, 2020. (Photo by Valentyn Ogirenko/Reuters)

Palestinian athlete Ahmed Abu Hasira demonstrates his parkour skills during a lockdown amid the coronavirus disease (COVID-19) outbreak in Gaza City on September 8, 2020. (Photo by Mohammed Salem/Reuters)