Clinical Study of O&D-001 Injection in the Treatment of Relapsed or Refractory Multiple Myeloma

This study is testing an experimental injection called O&D-001 in people with multiple myeloma (a type of blood cancer) that has come back or stopped responding to previous treatments. **You may be eligible if...** - You are between 18 and 75 years old - You have been diagnosed with multiple myeloma and your tumor cells test positive for BCMA or GPRC5D markers - You have already received at least 2 previous treatment regimens, including at least one proteasome inhibitor and one immunomodulatory drug - Your disease progressed during or within 12 months of your last treatment - You have measurable disease detectable in blood, urine, or bone marrow tests - Your physical functioning and blood counts are within acceptable levels **You may NOT be eligible if...** - You have serious heart, lung, kidney, or liver problems - You have an active infection or uncontrolled illness - You are pregnant or breastfeeding - You have received prior CAR-T cell therapy targeting BCMA or GPRC5D Talk to your doctor to see if this trial is right for you.