Lentiviral Gene Therapy (Zamtocabtagene Autoleucel) LTFU

This is an observational long-term follow-up (LTFU) study for subjects who previously received zamtocabtagene autoleucel, known as MB-CART2019.1.

This is a non-therapeutic study design. After successful screening, subjects will be monitored for potential gene therapy-related adverse events for up to 15 years post MB-CART2019.1 infusion. Subjects will be assessed yearly for the occurrence of delayed adverse events (AEs), monitored for replication competent lentivirus (RCL) and assessed for long term efficacy as well as CAR-T persistence.