A 12-year-old girl undergoes bone marrow transplant as pa of therapy for ALL. She subsequently presents with pulmonary complaints and neurologic findings. Lung biopsy reveals a granulomatous vasculitis with associated atypical lymphocytes. Clonality studies reveal a monoclonal B cell population with associated polyclonal T cells. What infectious agent is related to this diagnosis?
CMV EBV HPV HHV-8