Low Dose Teclistamab in Newly Diagnosed Multiple Myeloma Patients

This study is testing whether a low dose of teclistamab — a drug that helps the immune system find and destroy multiple myeloma cancer cells — can be used safely in people who have just been diagnosed with multiple myeloma and have not yet received any treatment. **You may be eligible if...** - You are 18 or older - You have been newly diagnosed with multiple myeloma and have not yet been treated - You are in generally good health (ECOG score 0 or 1) - You agree to use reliable contraception during treatment **You may NOT be eligible if...** - You have ever received treatment for multiple myeloma before - Your cancer has spread to the brain or spinal fluid - You have another blood cancer or certain rare plasma cell disorders - You have an active or severe infection - You need supplemental oxygen due to lung disease - You have active hepatitis B, hepatitis C, or HIV - You have had a stroke or seizure in the past 6 months - You have severe heart failure Talk to your doctor to see if this trial is right for you.