Summary
This study is testing a new treatment for people who have been newly diagnosed with a type of lung cancer called non-small cell lung cancer (NSCLC).
The study has two parts (called Substudy A and Substudy B). People will be placed into one of these substudies based on the specific type of their lung cancer, because different types are usually treated with different chemotherapy medicines.
Each substudy has two stages.
Phase 2 stage
This part looks at finding the best dose of pumitamig (also known as BNT327) and understanding how well the treatment works. Participants will be randomly assigned (by chance) to recieive one of two dose levels of pumitamig, together with standard chemotherapy.
Phase 3 stage
This part compares how well pumitamig works compared to other standard treatments in a larger gorup of people. Participants will be randomly assigned to receive either the dose level of pumitamig identified in the previous stage plus chemotherapy, or pembrolizumab immunotherapy with standard chemotherapy.
Each participant may be in the study for up to about 5 years and 4 months (64 months).