Vaccinations are recommended for babies to prevent the risk of diseases, because their immune systems are not fully mature to fight off infections. When the baby is developing in the mother’s womb, it is in a sterile environment. Babies’ stomachs produce less acid, making it easier for the ingested bacteria and viruses to multiply. According to the USD CDC’s Recommended Immunization Schedule, children 0-6 years of age should receive 24 vaccinations to protect them from up to 14 diseases by the time they complete 2 years of age.