GROUP I: Patients receive standard of care hepatitis A or B vaccine, tetanus toxoid vaccine, and trivalent influenza vaccine and then undergo standard of care treatment external beam radiation therapy and receive standard of care temozolomide. Patients also undergo collection of blood Samples monthly for the first 8 months and then bimonthly for up to 12 months for analysis via flow cytometry, carboxyfluorescein diacetate succinimidyl ester (CFSE) assay, live cell/dead cell distinction assay, and determination of naïve and memory immune response.