This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'To prevent Yellow Fever Aedes aegypti index should be less than? \nSelect and explain. \nA. 0.50%, B. 1%, C. 2%, D. 5%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Aedes aegypti index is a house index and defined as the percentage of houses and their premises,in a limited well defined area, showing actual breeding of Aedes aegylti larvae. This index should not be more than 1% in towns and seapos in endemic areas to ensure freedom from yellow fever. Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 301', 'role': 'assistant'}]