This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Foam cells are seen in infection with which virus - 
Select and explain. 
A. Measles, B. EBV, C. Molluscum contagiosum, D. RSV
B: EBV
Answer: B: EBV 
Explanation: Ans. is 'b' i.e., EBV * EBV encephalomyelitis shows :i) Abnormal white matter with perivascular infiltrates of inflammatory cells and foam cells.ii) Some myelin is replaced by lipid-filled macrophages and hyperplastic astrocytes.