<prompt> The following statements are true about DPT vaccine exceptAluminium salt has a adjuvant effectWhole killed bacteria of Bordetella peussis has an adjuvant effectPresence of acellullar peussis component increases its immunogenecityPresence of Hemophilus influenza type B component increases its immunogenicity  <response>: Diphtheria toxoid is given as a trivalent preparation containing tetanus toxoid and peussis vaccine as the DTP or DPT. Not only it is convenient, but B.peusis also acts as an adjuvant for the toxoids, producing a better antibody response. Reference: Textbook of Microbiology; Anathanarayan and panikers; 10th edition; Page no: 267 