<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: Polio virus is shed in stool up to -
Options:
A. 6 weeks
B. 8 weeks
C. 10 weeks
D. 12 weeks
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is D: 12 weeks. Explanation: - the polio is transmitted by faecal oral route by contaminmates food , water or hands. - in faeces, the virus is excreted as long as 3-4 months. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:205 <\p><|im_end|>
