To each his own on deciding to or not to vaccinate their child, but nat mentioned that the vaccines contained thimerosal............F.Y.I, products derived from blood plasma like the rho immune globin that some mothers have to get so the don't develop a possible resistance to future children has this chemical. Thimerosal is basically an antibiotic. It prevents the growth of bacteria. I do choose to vaccinate my children, but I also demand the single dose viles which eliminates the need for chemicals such as thimerosal.