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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.
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Vaccine with maximum efficacy is -
assistant
The correct answer is  Ans. is 'b' i.e. Measles Measles and tetanus have been explained in above explanation. BCG has variable efficiacy of 80% OPV requires multiple doses (three). OPV has > 90% efficacy in industrialized countries and 72-98% in hot climates when cold chain is properly maintained.