Figure. Timeline of clinical and virologic features for a 12-year-old immunocompromised child, before and after HSCT, Germany, 2009. A) Main clinical events and therapeutic measures. B) Viral DNA load measured by real-time PCR. CSA, cyclosporin A; HSCT, hematopoietic stem cell transplant; KIPyV, KI polyomavirus; BKPyV, BK polyomavirus; CMV, cytomegalovirus; EBV, Epstein-Barr virus.