Overview Long-Term Oral Acyclovir Usage to Prevent Herpes Zoster Virus Infection After Bone Marrow Transplant Status: Completed Trial end date: 2004-07-01 Target enrollment: Participant gender: Summary The objective of this study is to prevent reactivation of herpes zoster during the first year after transplant. Phase: Phase 3 Details Lead Sponsor: Fred Hutchinson Cancer Research CenterCollaborators: Burroughs WellcomeNational Institutes of Health (NIH)Treatments: Acyclovir