<prompt> The following statements are true about DPT vaccine except -Aluminium salt has an adjuvant effectWhole cell killed bacteria of Bordetella peusis has an adjuvant effectPresence of acellular peusis componentPresence of H.Influenza B component increase its immunolgenecity  <response>: H.influenza B is not a component of DPT vaccine. Acellular peussis component is present. Peussis component in DPT vaacine enhances the potency of the diphtheria toxoid. Adsorption on a mineral carrier like aluminium phosphate or hydroxide increases the immunological effectiveness of the vaccine. Ref:PARK;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page :162 