For Pre-teens, Teens, and Adults
Tdap is a tetanus, diphtheria, and pertussis vaccine given to preteens, teens, and adults as a one-time shot, or after exposure to tetanus under some circumstances. This is in place of one of the Td shots you would get every ten years. Tdap is especially important for those in close contact with infants.
Preteens and teens 11 through 18 years of age (preferably at age 11-12 years) should receive a single dose of Tdap.
Adults 19 or older who did not receive Tdap as a preteen or teen should also receive a single dose of Tdap.
Pregnant women should receive a dose of Tdap during each pregnancy, preferably at 27 through 36 weeks to maximize that amount of protective antibodies passed to the baby, but the vaccine can be safely given at any time during pregnancy.
New mothers who have never gotten Tdap should get a dose as soon as possible after delivery.
Tdap should also be given to 7- through 10-year-olds who are not fully immunized against pertussis.
Tdap can be given no matter when Td (tetanus and diphtheria vaccine) was last received.