DTaP is a vaccine that protects children from three serious infectious diseases caused by bacteria: diphtheria (D), tetanus (T), and pertussis (aP). Diphtheria is caused by the bacterium ...

In the United States, children receive five doses of diphtheria, tetanus, and acellular pertussis (DTaP) vaccine before 7 years of age. The duration of protection after five doses of DTaP is unknown.

Vaccines are a safe and highly effective way to protect people against disease. Tdap and DTaP are two common vaccines. They’re combination vaccines, which means they contain more than one vaccine in ...