If you want to understand how as untested genetic therapy may be utilized to cure cancers, then you have found the right book! You will find out how cancer attacks human cells and a virus may be modified to attack cancer cells to induce natural cell death called apoptosis. Cancers are diagnosed in human cells when they have genetically mutated. Simply, cancer cells are mutated human cells that do not function properly and have reproduced, but the cancer cells do retain some human DNA and cell functions that can be stimulated, like apoptosis. If apoptosis is stimulated in cancer cells, then the cells would die and be naturally flushed out of the body and not need to be surgically removed.