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
Isolation has a definitive value in all except: 
Select and explain. 
A. Diphtheria, B. Cholera, C. Pneumonic Plague, D. Hepatitis E
D: Hepatitis E
Answer: D: Hepatitis E 
Explanation: Hepatitis E