This clinical trial is focused on studying the treatment of Non-Small Cell Lung Cancer (NSCLC), which is a type of lung cancer. The study involves the use of several medications, including Cemiplimab, which is an anti-PD-1 antibody, and a combination of platinum-based chemotherapy drugs such as Paclitaxel, Cisplatin, Pemetrexed, Carboplatin, and Ipilimumab (also known by code names like BMS734016, HLX13, and IBI310). These medications are administered as solutions for infusion, meaning they are given directly into the bloodstream through an IV.
The purpose of this study is to compare the effectiveness of different combinations of these treatments in improving the overall survival of patients with advanced or metastatic NSCLC. The study is divided into two parts. In the first part, the effectiveness of cemiplimab combined with chemotherapy is compared to chemotherapy alone in patients whose tumors express a protein called PD-L1 in less than 50% of tumor cells. In the second part, the study compares cemiplimab with chemotherapy to a placebo with chemotherapy, regardless of PD-L1 expression.
Participants in the study will receive treatment over a period of time, with regular monitoring to assess their response to the treatment. The study aims to gather information on how well these treatments work in extending the life of patients with NSCLC and to observe any side effects that may occur. The study will also look at the quality of life of participants during the treatment period.



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