Viral Therapy In Treating Patients With Recurrent or Metastatic Squamous Cell Carcinoma of the Head and Neck Cancer or Metastatic Breast Cancer

This phase I trial studies the side effects and the best dose of viral therapy in treating patients with squamous cell carcinoma of the head and neck that has returned (come back) after a period of improvement or has spread to other parts of the body or breast cancer that has spread to other parts of the body. A virus called encoding thyroidal sodium iodide symporter, which has been changed in a certain way, may be able to kill tumor cells without damaging normal cells.