Polio virus is shed in stool up to -: (A) 6 weeks, (B) 8 weeks, (C) 10 weeks, (D) 12 weeks
Answer is D. - 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>