The adolescent diphtheria, tetanus and pertussis vaccine contains a small amount of diphtheria and tetanus toxins which are modified to make them harmless, small parts of purified components of pertussis, a small amount of aluminium salt and preservative.
This booster vaccine has lower concentrations particularly of diphtheria and pertussis components. The pertussis component in the vaccine is far more purified than the previous triple antigen vaccine and therefore has far less incidence of local injection site reactions, fever and other reactions. This vaccine is safe and well tolerated in adolescents and adults.