Enlarge this image Shoppers line up to buy supplies at Costco Wholesale in New Jersey last year as fears over...
Enlarge this image A CDC advisory panel has recommended a third Pfizer-BioNTech COVID-19 vaccine dose for those who are 65...
Enlarge this image Florida Gov. Ron DeSantis, seen at a news conference last week. His newly appointed surgeon general on...
Enlarge this image Rufus Peoples receives a dose of the Pfizer-BioNTech COVID-19 vaccine at a vaccination clinic in Southfield, Mich.,...
Enlarge this image A bald eagle perches on a tree at Sunset Park in Rock Island, Ill., in March. A...
Enlarge this image This photo made available by the Library of Congress shows a demonstration at the Red Cross Emergency...
Enlarge this image A health worker administers a dose of a Pfizer COVID-19 vaccine during a vaccination clinic earlier this...
Enlarge this image A sign in August informs customers that they must show proof of vaccination against COVID-19 in order...
Enlarge this image A health care worker prepares third doses of Pfizer-BioNTech COVID-19 vaccines for a senior living facility in...
Enlarge this image Researchers say all three authorized COVID vaccines are good at keeping people out of the hospital, but...
Enlarge this image Lions watch visitors from their enclosure at the Smithsonian National Zoo in Washington, D.C., in July 2020....
Enlarge this image People demonstrate against Italy's "green pass" on Saturday in Rome. Stefano Montesi/Corbis via Getty Images hide caption...