A. Fungal infection due to prolonged immunosuppression
B. Acute bacterial infection with Staphylococcus aureus 6 weeks following transplant
C. Reactivation of herpes simplex virus in the posttransplant period
D. Gram-negative bacteremia in the first 6 weeks following transplant
E. Pneumocystis jiroveci after being treated for hematogenous malignancy
F. Salmonella infection, given patient history of promyelocytic leukemia