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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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The most predominant type of polio virus during epidemics is -
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The correct answer is  Polio virus has three serotypes 1,2 and 3. Most outbreaks of paralytic polio are due to type-1 virus. Ref: PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page :205