Researchers testing immunotherapy with melanoma

Researchers continue to test what's called immunotherapy against cancer - this time with melanoma.

It's basically training the body's own immune system to kill cancer cells.

Doctors at Washington Hospital in St. Louis took melanoma tumors from three patients and then developed vaccines that were given back to each patient.

They have seen a good response but it's too soon to tell if this will help in the long run so studies continue.