Viral therapy is a novel approach to treating cancers. Infectious shells (viruses) are altered so that instead of causing illness, they fight it from the inside. Because of it's broad applicability, viral therapy shows promise in treating cancer.
Read more about viral therapy:
PubMed review of viral therapy
There are many more articles on Pubmed that discuss various uses of viral therapy and oncolytic viruses. The abstracts are almost always free, and many articles are available through resources at local schools and public libraries. Happy reading!