Pfizer Inc...announced its investigational cancer immunotherapy, elranatamab, received Breakthrough Therapy Designation from the U.S. Food and Drug Administration (FDA) for the treatment of people with relapsed or refractory multiple myeloma (RRMM)...The Breakthrough Therapy Designation is based on six-month follow-up data from cohort A (n=123) of MagnetisMM-3, an open-label, multicenter, single arm, Phase 2 study evaluating the safety and efficacy of elranatamab monotherapy in patients with RRMM.