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Vaccine Therapy in Treating Patients With Stage III Colon or Rectal Cancer

Trial Status: complete

This pilot clinical trial studies what effects (good and bad) a new investigational vaccine has in treating patients with stage III colon or rectal cancer. The vaccine is made from a modified virus that contains a gene encoding the protein carcinoembryonic antigen (CEA). Once the virus is given as a vaccine, it can enter certain cells in the body, such as some types of immune cells. The vaccine has been made to transfer a copy of the gene that makes the CEA protein to the cells, which may cause extra copies of the CEA protein to be made in the cells. These cells will break up the CEA protein and show pieces of it to other immune cells to tell them to attack cancer cells expressing CEA.