system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
True about DPT vaccine ?
assistant
The correct answer is  Ans. is 'b' i.e., Prevent development of carrier Diphtheria toxoid (in DPT) prevents development of disease by inducing antibody formation against diphtheria toxin (exotoxin) which is responsible for disease. But, it does not prevent carrier state as antibodies are not produced against organism and it can reside in nasopharynx.