DTaP / Tdap / Td

Four doses at 2, 4, 6 and 18 months of age.

Routine infant series with a DTaP-IPV-Hib-containing vaccine at 2, 4, 6 and 12 to 23 months (generally 18 months); the first dose can be given as early as 6 weeks. Minimum 4 weeks between primary doses and 6 months between dose 3 and the booster. Late starters follow a catch-up schedule set by your clinician.

Four doses at 2, 4, 6 and 18 months of age, including hepatitis B.

Six-in-one infant series used where hepatitis B is given in infancy. Doses at 2, 4, 6 and 12 to 23 months (generally 18 months). Infants born to mothers with hepatitis B need separate hepatitis B vaccine and immune globulin at birth.

Single booster dose at 4 to 6 years of age.

DTaP-IPV or Tdap-IPV as the booster for children 4 to 6 years of age who completed the infant series. Not needed if the fourth infant dose was given at 4 years of age or older.

Four doses at 2, 4, 6 and 18 months of age when Hib is given on its own.

Hib vaccine alone, when a combination product is not used. Children starting at 7 to 11 months need 2 doses plus a booster; at 12 to 14 months 1 dose plus a booster; at 15 to 59 months a single dose. Not routinely recommended after 5 years of age except for asplenia, stem-cell transplant and other high-risk conditions.

Three doses at 0, 1 to 2 months and 6 to 12 months.

For people who were never immunized, or not fully immunized, against polio and need protection (travel, work, outbreak). Dose 2 at least 4 weeks after dose 1; dose 3 at least 6 months after dose 2. Infants and young children receive polio vaccine within a combination product instead. Adults who completed a series may need one lifetime booster for travel to polio-affected areas.

One Tdap dose at 14 to 16 years as the first 10-year booster.

Tdap vaccine should be administered to adolescents at 14 to 16 years of age as the first 10-year booster dose after the childhood series.

One Tdap dose in adulthood, then Td or Tdap every 10 years.

Every adult should receive one Tdap dose if not previously immunized against pertussis as an adult, then Td (or Tdap) every 10 years. Also given to adults who will be in close contact with infants. Children 7 to 13 who missed the childhood series follow a catch-up schedule.

One Tdap dose in every pregnancy, ideally between 27 and 32 weeks.

Recommended in every pregnancy regardless of previous Tdap, ideally at 27 to 32 weeks of gestation to protect the newborn. Immunization between 13 and 26 weeks may be considered when preterm delivery or travel is anticipated.

One Tdap-IPV dose for people 4 years and older who need both pertussis and polio boosting.

Used as the 4 to 6 year school-entry booster in some provinces, and for adolescents or adults who need a polio booster together with Tdap (travel to polio-affected areas, incomplete polio series).

One Td booster dose every 10 years after a completed primary series.

Routine booster every 10 years for people 7 years and older who completed a primary tetanus/diphtheria series. Tdap is preferred for the first adult booster. A wound may call for a dose sooner than 10 years.

Three doses at 0, 1 to 2 months and 6 to 12 months; Tdap for the first dose.

For people 7 years and older with no or unknown tetanus/diphtheria immunization. Dose 1 is Tdap, then Td at 1 to 2 months and 6 to 12 months (minimum 4 weeks between doses 1 and 2, 6 months between doses 2 and 3). Polio vaccine is added if that series is also incomplete.