This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
Contact isolation is done for 
Select and explain. 
A. Typhoid, B. Mumps, C. MRSA, D. Diphtheria
D: Diphtheria
Answer: D: Diphtheria 
Explanation: * Strict isolation is must for patient diagnosed with diphtheria. * Even when clinically suspected, patient must be isolated. * A staff who has known immunisation history should nurse the patient. Ref:- Greenwood medical microbiology 18th ed; pg num:- 202