Biotechnology US biotech Y-mAbs Therapeutics (Nasdaq: YMAB) saw its shares plunge more than 30% to $6.20 in after-hours trading on Friday, after it announced a negative outcome of the US Food and Drug Administration (FDA) Oncologic Drugs Advisory Committee (ODAC) meeting, which reviewed investigational Omblastys (131I-omburtamab) for the treatment of CNS/leptomeningeal metastasis from neuroblastoma. 29 October 2022