ComvacTM 3 is a sterile, whitish, cloudy, uniform suspension of diphtheria, tetanus toxoids and pertussis whole cell inactivated vaccine adsorbed on a mineral carrier aluminium phosphate gel in isotonic saline solution.The Diphtheria and Tetanus components are toxoids prepared by formalin inactivation using established technology. The Pertussis component is a whole cell culture, inactivated by using standard methods.