DTaP and Tdap are both vaccines that protect against diphtheria, tetanus, and pertussis, but they are used for different age groups. DTaP is given to children younger than 7 years old, while Tdap is a booster vaccine given to older children, adolescents, and adults. The dosages of diphtheria and pertussis are lower in Tdap to reduce the risk of side effects in older individuals.
