Petty Officer 3rd Class Amber Degouveia, a health series technician assigned to Coast Guard Base Alameda Medical in California, administers the intranasal flu vaccine to a Coast Guard member in October 2015. (Image credit: U.S. Coast Guard / Petty Officer 2nd Class Barry Bena)
A boy receives a COVID-19 vaccine at a L.A. Care Health Plan vaccination clinic at Los Angeles Mission College in the Sylmar neighborhood in Los Angeles on Jan. 19, 2022. (Photo by ROBYN BECK/AFP via Getty Images)