Oncollytic Virus in Cancer Cells (IMAGE) City of Hope Caption After the oncolytic virus was added to the cancer cells, it forced an abundance of CD19 to be expressed on their cell surface (shown in purple). Credit City of Hope Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.