This study is for patients that have had hematopoietic stem cell transplants and/or have been donors. The purpose of this study is to see how well transplant works in adults with a MMUD using stem cells from a donor's blood, and in children with a MMUD using stem cells from a donor's bone marrow.This study treatment does not include any investigational drugs. The medicines and procedures in this study are standard for transplant. Participants can expect to be on this study for approximately 1 year.

This study is for children and adults that have been diagnosed with a disease that is associated with Epstein-Barr Virus (EBV) infection.The investigational treatment in this study is called tabelecleucel (also known as ATA129), this treatment is given in the vein. Participants will receive tabelecleucel on Day 1, Day 8 and Day 15 of every 35-day (5-week) period, the number of cycles depends on the response to treatment. The purpose of this study is to assess the safety of tabelecleucel and to assess the effects of tabelecleucel on EBV disease. Participants can expect to be in this study for about 2 years for an estimated 17-20 study visits.

This study is for subjects that are about to receive high dose cyclophosphamide before a blood or bone marrow transplant (BMT). The investigational drug in this study is Olanzapine.This research is being done to find out whether adding olanzapine to standard antiemetics will be helpful in controlling CINV in children receiving chemotherapy a blood or bone marrow transplant. To find this out, some of the participants in this study will get olanzapine and others will receive a placebo (a substance that looks like olanzapine but does not have any active or medicinal ingredients). This will allow us to compare treatment of CINV with and without olanzapine.

This study is for patients that have been diagnosed with Epstein-Barr Virus associated Post-Transplant Lymphoproliferative Disorder (EBV-PTLD). The investigational drug in this study is tabelecleucel. Tabelecleucel is a product containing special immune allogeneic cells, called EBV-Cytotoxic T Lymphocytes (EBV-CTLs), that are made in the laboratory starting with cells from a healthy person who is immune to EBV. The purpose of this study is to test how well tabelecleucel works to treat EBV-PTLD following SOT in patients who have not responded to rituximab or rituximab plus chemotherapy treatment and to see what side effects happen. Your participation will help us to understand more about tabelecleucel. In the first 12-month period, participants will be asked to come to the clinic for an estimated 11 to 19 study visits and a minimum of 2 scans, depending on the number of cycles of treatment they are given. After treatment is done, participants will enter into the follow-up phase, and will continue to come into the clinic for scheduled check-ups for up to 24 months after the first dose of tabelecleucel was given. Participant information on the status of their disease and any new treatment will be collected for up to an additional 3 years. Participants can expect to be in this study for up to five years total.

The primary purposes of this study are to:
•Provide access to cord blood units for recipients whose best choice for a cord blood unit(s) do not meet all FDA standards, but do meet standards set by the NMDP on this study.
•Assess how well and how quickly blood counts return to normal after transplant in recipients on this study.

The primary purpose of the Research Sample Repository is to make blood samples available for research studies related to histocompatibility and hematopoietic cell transplantation (HCT) or other cellular therapy.

The Center for International Blood and Marrow Transplant Research (CIBMTR ) keeps a research database. It uses this database to collect and study the medical data for patients that have received Hematopoietic Cell Transplantation, Other Cellular Therapies and Marrow Toxic Injuries. It also collects and studies data from donors who give bone marrow or peripheral blood stem cells (PBSCs). These therapies are used to treat cancer and other diseases. The purpose of this study is to add more data to the database. Participants will have medical data (data about their disease, transplant or cellular therapy) collected before and after transplant cellular therapy, and once a year afterwards for life.