NAPNAP has an Immunization Special Interest Group with resources.
Parents should make sure their children are protected against measles with two doses of MMR vaccine–the first dose at 12 through 15 months of age and the second dose 4 through 6 years of age.
Immunization Action Coalition - Vaccine Information You Need
World Health Organization — What are some of the myths – and facts – about vaccination
Children’s Hospital of Philadelphia (CHOP) — Vaccine Education Center
National Foundation for Infectious Diseases — HPV Vaccination Resource Center
Every Child By Two - Vaccinate Your Family