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': 'Agent in KFD - \nSelect and explain. \nA. Soft tick, B. Hard tick, C. Louse, D. Bug', 'role': 'user'}, {'content': 'Answer: B \nExplanation: <p>kyasanur forest disease:- Agent- group B toga virus ( flavivirus). Rats and squirrels- main reservoir Monkeys- amplifier host. Vectors- Haemaphysalis. Age: 20-40 years. Sex- males more Mode of transmission- monkeys and ticks. By the bite of infective ticks ( hard ticks). Incubation period- 3-8 days. {Reference: park&;s textbook of preventive and social medicine, 23rd edition, pg no.289}</p>', 'role': 'assistant'}]