what is tdap vaccine

Tdap vaccine is a combination vaccine that protects against tetanus, diphtheria, and pertussis (whooping cough). Tetanus enters the body through cuts or wounds, while diphtheria and pertussis spread from person to person. The vaccine is given as a booster shot to children and adults, and pregnant people need it during each pregnancy to protect their baby against whooping cough. Tdap may be given at the same time as other vaccines, and people with minor illnesses may receive it. Tdap is safe for most people, but those who have had an allergic reaction after a previous dose of any vaccine that protects against tetanus, diphtheria, or pertussis, or have any severe, life- threatening allergies, should tell their vaccination provider.