VBL Therapeutics announced the presentation of the positive outcome of pre-planned interim analysis results from the OVAL Phase 3 pivotal clinical trial in platinum-resistant ovarian cancer at the American Society of Clinical Oncology (ASCO) 2020 virtual annual meeting. The analysis compared the CA-125 objective response rate (ORR) according to GCIG criteria in the treatment and control arms among the first 60 evaluable patients. The CA-125 ORR in those patients was 53%. Assuming a balanced randomization, the response rate in the treatment arm (VB-111 in addition to weekly paclitaxel) was 58% or higher. In patients who had post-dosing fever, which is a marker for VB-111 treatment, the response rate was 69%. The CA-125 response rate observed in the Phase 3 interim analysis is at least as good as the response rate seen in the prior Phase 2 study, which enrolled a similar patient population and showed overall survival benefit. In the previously reported Phase 2 study of VB-111 in platinum resistant ovarian cancer, 58% of the patients treated with VB-111 and paclitaxel demonstrated a CA-125 response. Those patients with a CA-125 response demonstrated a median overall survival of 808 days, versus 351 days for those patients without a CA-125 response.