Why Vaccines Matter
Senior Airman Katrina Alvarez prepares a vaccine for a basic cadet during in-processing June 27, 2013. Vaccines consist of dead or weakened forms of a virus that is injected into a patient to create a long-lasting immune response. Alvarez, now a staff sergeant, is a medical technician with the 10th Aeromedical Squadron. (U.S. Air Force photo/Liz Copan)

Download Image: Full Size (1.24 MB)
Photo by:  |  VIRIN: 130627-F-EW478-508.JPG