SAN DIEGO and PENNINGTON, N.J., May 22, 2019 /PRNewswire/ — OncoSec Medical Incorporated (OncoSec) (NASDAQ:ONCS), a late-stage cancer biotechnology company developing gene-based intratumoral immunotherapies, today announces interim data from KEYNOTE-890, an ongoing Phase 2 study of TAVO™ (intratumoral IL-12) in combination with KEYTRUDA® in patients with heavily pretreated, metastatic, chemotherapy refractory triple negative breast cancer …