Cytomegalovirus Infection in Transplant Recipients Resolves When Circulating γδ T Lymphocytes Expand, Suggesting a Protective Antiviral Role

γδ T cells undergo massive expansion in the peripheral blood of renal transplant recipients who are infected with cytomegalovirus (CMV). In a 3-year prospective study, the relationship between the evolution of CMV infection and the kinetics of γδ T cell amplification was followed for 10 months after transplantation. Patients with late γδ T cell expansion (⩾45 days) had significantly longer (P