This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Case fatality rate of a disease is a measure of its- \nSelect and explain. \nA. Infectivity, B. Endemicity, C. Virulence, D. Chronicity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .case fatality rate represents the killing power of a disease.it is simply the ratio of deaths to cases.the time interval is not specified.it is usually used in the case of acute infections such as food poisoning,cholera,measles etc.its usefulness to chronic diseases is limited.because the period from onset to death is long and variable.the case fatality rate for the same disease may very in epidemics.it is closely related to VIRULENCE. REF:park&;s textbook ,ed22,pg no 55', 'role': 'assistant'}]