They study is for patients that have have been diagnosed with platinum-resistant or platinum-refractory ovarian cancer (PRROC) which includes fallopian tube cancer and peritoneal carcinomatosis (a form of cancer that affects the thin membrane that surrounds your abdominal organs). The investigational drug used in this study is Olvi-Vec. The main purpose of the study is to determine how women diagnosed with PRROC will best respond to receiving Olvi-Vec followed by platinum-doublet chemotherapy (platinum-based chemotherapy such as carboplatin or cisplatin are given with a non-platinum based chemotherapy, including gemcitabine, paclitaxel, docetaxel, nab-paclitaxel, or pegylated liposomal doxorubicin [PLD]) along with bevacizumab, known as the Experimental Arm. Participants can expect to be in this study for up to 36 months.

This study is for women with endometrial cancer. This study is being done to see if by adding a drug or drugs that target HER2 proteins in addition to the usual combination of chemotherapy drugs.