This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Target group forpulse polio immunization- \nSelect and explain. \nA. > 3 years, B. < 5 years, C. < 10 years, D. < 15 years', 'role': 'user'}, {'content': "Answer: B \nExplanation: Goverment of India conducted the first round of PPI consisting of two immunization days 6 weeks apart on 9th Dec 1995 and 20th Jan 1996.\nThe first PPI conducted targeted all children under 3 years of age. o Later on, as recommended by WHO,\xa0it was decided to increase the age group from decided to increase the age group from under 3 to under 5 years →So, now PPI targets children under 5 years of age.\nThe term pulse has been used to describe this sudden, simultaneous, mass administraon of OPV on a single day to all children 0-5 years of age,\xa0regardless to previous immunizaon status, a PPIs occur as two rounds about 4 to 6 weeks apart during low transmission season of polio,\xa0i.e. between November to february (In India, peak transmission is from june to September),\nThe dose of OPV during PPIs are extra doses w rhich supplement, and do not replace the doses received during routine immunization schedule.\nIntensive pulse polio immunization (IPPI) is the intensification of PPI by adding additional rounds at fixed booths followed by 'house -to- house search-and-vaccinate ’ component.", 'role': 'assistant'}]