Parents, DO NOT VACCINATE YOUR CHILDREN! Besides the fact that vaccines don't work, cause HARM, here are the added ingredients (listed on CDCs website)... Tdap: Aluminum Hydroxide, Bovine Extract, Formaldehyde or Formalin, Glutaraldehyde, Polysorbate 80 http://www.cdc.gov/vaccines/pubs/pinkbook/downloads/appendices/B/excipie... If you wish to harm your child vaccinate them. Otherwise, stay as far away from Government and Medical quacks.