This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: International health agencies, Subject name: Social & Preventive Medicine
[{'content': 'Emporiatrics is study of \nSelect and explain. \nA. Bioterrorism agents, B. Tropical diseases, C. Health of International travelers, D. International health agencies', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Emporiatrics: Study of Health of international travelers. Mainly for yellow fever. Validity of vaccine ceificate of yellow fever is 10 days - life long. Quarantine period - 6 days', 'role': 'assistant'}]