Composite swimmer plot showing the clinical course of patients over the 12 months after VST infusion. Patients appear in order of recruitment on the y-axis. Patients treated for EBV infection are noted (n = 3); all others were treated for CMV infection (n = 27). All patients received the first VST infusion at day 0 (green line), and their subsequent clinical courses are illustrated. Antiviral treatment is shown before and after infusion: blue boxes (CMV therapy) and purple vertical lines (rituximab doses for EBV).