Clinical trials to treat cancer tests vaccines made from patients ' own tumors . ( CNN ) -- No patients who received vaccines have seen their cancer return . The antibodies alert the body 's immune system to attack multiple points on the cancer cells . Using a vaccine to fight cancer makes sense to David Holl , a biologist who lives in California .
Clinical trials to treat cancer tests vaccines made from patients ' own tumors . No patients who received vaccines have seen their cancer return . The antibodies alert the body 's immune system to attack multiple points on the cancer cells . Using a vaccine to fight cancer makes sense to David Holl , a biologist who lives in California .