A Study of Maribavir in Adults With Kidney Failure Who Have a Cytomegalovirus (CMV) Infection After Transplantation

Inclusion Criteria: * Adults more than and equal to (≥) 18 years of age at index date. * Diagnosis of comorbid ESRD or comorbid severe CKD prior to the index date. * If ESRD (including participants on peritoneal dialysis or hemodialysis): participant diagnosed with ESRD confirmed by an estimated glomerular filtration rate (eGFR) less than (\<) 15 milliliters per minute per 1.73 square meters (mL/min/1.73m\^2). * If severe CKD: participant diagnosed with severe CKD confirmed by an eGFR of 15 to \<30 mL/min/1.73m\^2 at index. * Participant has undergone solid organ transplant (SOT) or hematopoietic stem cell transplantation (HSCT) before index date. * Participant was diagnosed with refractory (with or without resistance) CMV during the latest post-transplant period. * Participant initiated treatment with maribavir in routine practice within the eligibility period and received at least 1 dose of maribavir. * Informed consent provided (where required by local regulations) before data collection commences. Exclusion Criteria: There are no exclusion criteria for this study.