Kent Nishimura/Getty Images
vaccines
Kent Nishimura/Getty Images
Kayla Bartkowski/Getty Images
National Institute of Allergy and Infectious Diseases / Unsplash
CDC / Unsplash
Joe Raedle / Getty Images
Anthony Eyring/UCS
Boston Public Library
Prasesh Shiwakoti (Lomash)/Unsplash
Tom Wolf/Flickr
World Health Organization
Pan American Health Organization/Flickr
US Air Force
SELF Magazine/Flickr