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': 'Incubation period of new disease determined by? \nSelect and explain. \nA. Lead time, B. Generation time, C. Serial interval, D. Latent period', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Generation time Generation time Interval between receipt of infecton by host and maximal infectivity of the host. Generation time is roughly equal to the incubation period.", 'role': 'assistant'}]