Immunotherapy: A new target for cancer cure (Review).

Cancer is the leading cause of death globally and there is a worldwide cancer epidemic. Immunotherapy has emerged as a promising anticancer therapy. In particular, oncolytic viruses destroy cancer cells without destroying normal tissue via viral self‑replication and anti‑tumor immune responses, showing potential for cancer therapy. The present review discusses the role of the immune system in the treatment of tumor. The strategies for treating tumors are briefly introduced from aspects of active immunization and passive immunotherapy and the dendritic cell vaccines and oncolytic viruses are highlighted, as well as use of blood group A antigen in the treatment of solid tumors.