RecruitingPhase 1Drug trialSafety Trial of Antimicrobial Therapy and Precision Radiation Therapy in Patients With Oligoprogressive Non-small Cell Lung CancerThe first phase of this study was an open label, randomized pilot study. Enrollment for this phase is now complete. The second phase is a single arm phase 1 safety study. Patients planned to undergo precision hypofractionated radiation to all sites of oligoprogression will receive vancomycin for 1 week before RT and for 1 month after start of RT, and asked to provide stool and blood samples as outlined in the Safety Trial study table.