Social & Preventive Medicine Communicable Diseases 485b0fa3 Preservative added in DPT vaccine is : A Zinc phosphate B Aluminum phosphate C MgS04 D ZnS04 High-Yield Explanation Ans. is 'b' i.e. Aluminium Phosphate Aluminium phosphate is used as an adsorbent in DPT vaccine. Adsorption increases the immunological effectiveness of the vaccine