URMC / Encyclopedia / Collection Immunizations Diphtheria, Tetanus, and Pertussis (DTaP) Measles, Mumps, and Rubella (MMR) Vaccine Polio (IPV) Haemophilus Influenzae Type b (Hib) Chickenpox Pneumococcal Infection in Children Hepatitis B Virus (HBV) in Children Childhood Immunizations What Every Parent Should Know About Immunizations