Inclusion Criteria:  ARM 1: Age >= 18 years ARM 1: Provide written informed consent ARM 1: Patients undergoing commercial CAR-T cell therapy in an outpatient setting ARM 2: Age >= 18 years ARM 2: Provide written informed consent ARM 2: Patients with a plan to undergo radiation therapy for lung, gastrointestinal, or head and neck cancer  Exclusion Criteria:  ARM 1: Non-English speaking ARM 1: Planned initiation of lymphodepleting chemotherapy in the inpatient setting ARM 2: Non-English speaking