A nurse prepares doses of the Pfizer vaccine during a COVID-19 vaccination event at Josephine's Southern Cooking in Chatham, Illinois, Dec. 30, 2021.Brian Cassella...
A sign advertises COVID-19 (coronavirus) vaccine shots at a Walgreens Pharmacy in Somerville, Massachusetts, August 14, 2023.Brian Snyder | ReutersThe Centers for Disease Control...