NCIt definition : Any virus that is able to selectively infect and destroy cancer cells.;
Alternative definition : NCI-GLOSS: A type of virus that infects and lyses (breaks down) cancer cells but not
normal cells. Oncolytic viruses can occur naturally or can be made in the laboratory
by changing other viruses. Certain oncolytic viruses are being studied in the treatment
of cancer. They may make it easier to kill tumor cells with chemotherapy and radiation
therapy.;