The recommended time schedule for children’s vaccinations varies from one vaccine to the next, although many are given out at regular intervals, such as 2, 4 and 6 months, as well as 12, 15 and 18 months. These times, per vaccine, include: - Hep B — Three doses are needed in total: the first is given right away (in case the mother is affected by the virus); the second dose is recommended between 1 and 2 months of age; and the third dose is recommended between 6 and 18 months. - Rotavirus — These vaccines come in either two or three doses, depending on the vaccine manufacturer: the first dose is given at 2 months old; the second is given at 4 months old; and, if needed, the third dose is given at 6 months old. - DTaP — The diphtheria, tetanus and pertussis (DTaP) vaccine requires five doses: the first four are recommended at 2 months, 4 months, 6 months, and between 15 and 18 months old; the last dose is recommended between the ages of 4 and 6. - Hib — Doses range from three to four, depending on the manufacturer of the vaccine: the shots are given at 2 months, 4 months, and between 12 and 15 months old; if a fourth dose is needed, it is provided at 6 months. - PCV — The pneumococcal vaccine is a series of four doses: the first is given at 2 months; the second at 4 months; the third at 6 months; and fourth between 12 and 15 months. - IPV — The poliovirus vaccine is another four-dose series: the first three are recommended at 2 months, 4 months, and between 6 and 18 months old; the fourth is given between the ages of 4 to 6. - MMR — The measles, mumps, and rubella vaccine is given in two doses: the first dose is given between 12 and 15 months old; the second is given between ages 4 to 6. - Varicella — The chickenpox vaccine is also given in two doses: the first is given between 12 and 15 months old; the second is between 4 to 6 years old. - Hep A — Requires two doses: the first dose is recommended at 12 months old; the second is given at least six months apart.