This study investigates the effects of an investigational medication on patients with unresectable stage III non-small cell lung cancer (NSCLC). The purpose is to understand the benefits and side effects of using the investigational medication alone or in combination after patients have completed chemotherapy and radiation. NSCLC is a type of lung cancer that cannot be removed by surgery and has spread within the chest.
Participants will receive either the investigational medication alone or in combination. The study will monitor the effects of the treatment, which involves the body's immune system. This is called consolidation immunotherapy. Participants will be observed for any changes in their condition and any side effects they might experience.
- Who can participate: Adults with unresectable or inoperable stage IIIA or IIIB non-small cell lung cancer who have completed prior cancer treatment at least 28 days before joining the study and have adequate organ function are eligible. Participants must not have active infections, metastatic disease, autoimmune diseases requiring treatment, and must not be pregnant or breastfeeding.
- Study details: Participants will be randomly assigned to receive either the investigational medication alone or in combination with another. A placebo is not used in this study. Participants will be monitored for side effects and changes in their health.

