What Tdap covers
Tdap is a combination vaccine that protects against tetanus, diphtheria and pertussis. Pertussis can cause a prolonged cough and is particularly serious for young infants.
Three-part booster protection
Tdap combines protection against tetanus, diphtheria and pertussis, also called whooping cough. Adults, pregnant people and those with incomplete records may have different reasons to review their protection.

At a glance
What to know
Tdap is a combination vaccine that protects against tetanus, diphtheria and pertussis. Pertussis can cause a prolonged cough and is particularly serious for young infants.
Canadian guidance recommends an adult Tdap dose for people who have not received one in adulthood and a Tdap dose during every pregnancy. Individual timing is reviewed privately.
Booster history, childhood doses, pregnancy, wound management and previous vaccine reactions can affect which product and timing apply.
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