Figure 1 (IMAGE) Arizona State University Caption The graphic outlines the process of introducing oncolytic (cancer-killing) viruses. They may be injected directly into tumors or transported to the affected site with carrier cells. The viruses then begin to attack and kill cancer cells and trigger cell suicide processes like apoptosis and necroptosis. The oncolytic viruses then act to stimulate various cells of the immune system, alerting them to the presence of viral invaders as well as cancer and helping them overcome cancer's ability to suppress immune activity. The graphic also shows a number of tactics for improving oncolytic viruses. Graphic courtesy the journal Cancers. Credit By permission from the journal Cancers Usage Restrictions None License Original 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.