Ana Travezano, 39, a nurse at the Humanitas Gavazzeni Hospital in Bergamo, Italy poses for a portrait at the end of her shift Friday, March 27, 2020. (AP Photo/Antonio Calanni)
This image provided by Abbott Laboratories show the company's BinaxNOW Ag Card COVID-19 home test. (Abbott Laboratories via AP)
North Memorial Health Hospital Chief Administrative Officer Samantha Hanson was overcome with joy after 975 doses of the Pfizer COVID-19 vaccine were unboxed and placed into a specialized freezer in the hospital's pharmacy Tuesday, Dec. 15, 2020 in Robbinsdale, Minn. (Aaron Lavinsky/Star Tribune via AP, Pool)
Sarita Reyes works on her school assignments on an iPad at her mother's shop, Pinata Time, on Tuesday, Dec. 15, 2020, in San Antonio, Texas. (Billy Calzada/The San Antonio Express-News via AP)