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': 'Isolation has a definitive value in all except: \nSelect and explain. \nA. Diphtheria, B. Cholera, C. Pneumonic Plague, D. Hepatitis E', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hepatitis E', 'role': 'assistant'}]