This clinical trial is focused on studying treatments for Non-small Cell Lung Cancer (NSCLC), a common type of lung cancer. The study involves the use of several investigational medications, including pembrolizumab (also known as KEYTRUDA), MK-4830, and rolistobart (also known as MK-0482). These medications are given as a solution for infusion, which means they are administered directly into the bloodstream through a vein.
The purpose of the study is to evaluate how well these treatments work in patients who have not received prior treatment for their advanced NSCLC and whose tumors have a specific protein called PD-L1. The study will explore different combinations of these medications to see which is most effective. Some patients may receive a placebo, which is a substance with no active medication, to compare the effects of the investigational drugs.
Participants in the study will receive treatment over a period of time, with regular monitoring to assess their response to the medication. The study aims to understand the objective response rate, which is a measure of how the cancer responds to the treatment. Additionally, the study will track progression-free survival, which is the length of time during and after treatment that a patient lives with the disease without it getting worse, and any adverse events, which are side effects or any unwanted effects of the treatment.



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