A Randomized, Double-blind, Placebo-controlled, Dose-ranging Study to Assess the Safety, Tolerability, and Prophylactic Anti-cytomegalovirus Activity of Maribavir in Recipients of Allogeneic Stem Cell Transplants

Cytomegalovirus (CMV) infections remain a significant problem following various types of
transplants that are associated with strong immunosuppressive therapy. Maribavir is a new
oral anti-CMV drug with a novel mechanism of action compared to currently available anti-CMV
drugs. This study will test the safety and anti-CMV activity of different doses of maribavir
when given as CMV prophylaxis following stem cell transplants.