This medical video explains the different ways to fight cancerous cells.
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Jennifer Mathews: Ask Valarie Hill what she thinks of medicine, and she'll be honest. Valarie Hill: I am sick, sick, sick, sick, sick, sick, sick, sick, sick, sick, sick of medicine. Jennifer Mathews: She has good reason to be. Her first brain tumor came in 1993. It recurred in 1995, 2002, and again in 2003. Her last tumor was removed 6 months ago. She received chemo and an experimental treatment called Interferon Alfa 2B Recombinant. It activates the body's immune system. Surasak Phuphanich: This is another new frontier of therapy beside surgical, radiation, chemotherapy. Immunotherapy is the next frontier to fight against the cancer. Jennifer Mathews: Three days a week, Valarie gets a shot of the medicine. She hopes it keeps her tumor away for good. Doctor Phuphanich says he is able to increase patients' lives by 50 percent. Surasak Phuphanich: I don't think we can win them all, but the ones that we save and can maintain quality of life -- I think that they keep me in this business. Valarie Hill: I feel wonderful. I'm blessed and everything; everything is just alright now. Jennifer Mathews: Even though she is sick of it, Valarie knows medicine is her best shot at survival. This is Jennifer Mathews reporting.