http://www.cdc.gov/vaccines/pubs/VIS/downloads/vis-dtap.pdf
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Centers for Disease Control and Prevention, U.S. Department of Health and Human Services
Diphtheria, tetanus, and pertussis are serious diseases caused by bacteria that can be prevented by getting the DTaP vaccine. Learn who should get DTaP vaccine and when, potential risks, and what to do if you have an allergic reaction.