Clostridioides difficile (C. difficile) is a bacterium (germ) that can spread from one person to another causing severe diarrhea (watery poop) that at its worst can lead to death. Pfizer has been studying an investigational vaccine to prevent diarrhea caused by C. difficile. To be part of this study you must be 65 years old or older and have one or more of…
This study is being done to determine if REGN2810 (anti-PD-1) in combination with ipilimumab (anti-CTLA-4) plus initial platinum-based doublet chemotherapy, or REGN2810 in combination with ipilimumab will prolong how long you live without your disease progressing compared to the standard of care pembrolizumab (anti-PD-1)…