A Long-Term Follow-Up Study for Participants Previously Treated With KYV-101

This is a long-term follow-up study designed to monitor the health and safety of people who previously received a CAR-T cell therapy called KYV-101 in an earlier clinical trial. CAR-T therapy reprograms your own immune cells to recognize and attack disease. Because this type of treatment can have long-lasting effects, this study tracks participants over an extended period to understand any lasting benefits or risks. **You may be eligible if...** - You received at least one infusion of KYV-101 as part of a previous KYV-101 treatment study - You are willing and able to provide informed consent to participate in this long-term follow-up program **You may NOT be eligible if...** - You did not previously participate in a KYV-101 parent treatment study - You are unable or unwilling to provide informed consent Talk to your doctor to see if this trial is right for you.