Adherence and immune response to revaccination following hematopoietic stem cell transplantation at a pediatric onco-hematology reference center.

Background: Revaccination after hematopoietic stem cell transplantation (HSCT) is necessary to compensate for the loss of immunological memory. The aims of this study were to evaluate the adherence to revaccination schedule and the humoral immune response to different vaccine antigens in HSCT pediatric and young adult patients.

Methods: Patients submitted to HSCT for over 3 years were recruited.