The FDA has recently approved of a new drug that is designed to target and kill cancer. The new drug is called Imlygic and is actually a virus. It is a modified strain of the herpesvirus. The drug/virus is injected into the area of infection and it actively targets and bursts cancer cells. The immune system then kicks in to clean up the debris left behind. Results have shown that the drug can extend a cancer patients life by up to 4 months. This isn't a complete cure but it is a good step in the right direction in the fight against cancer.
For more info: Cancer Killing Virus