Researchers are always looking for better and more effective cancer treatments. Immunotherapy is one such therapy. Immunotherapy employs the body’s natural defenses to combat cancer. This strategy is novel to conventional chemotherapy, which uses chemicals to destroy cancer cells. Lung, melanoma, and prostate cancer are just a few cancers that immunotherapy is showing promise in treating. Checkpoint inhibitors are one sort of immunotherapy proven to be particularly effective against some malignancies. Checkpoint inhibitors prevent the immune system’s ability to fight cancer cells by inhibiting specific proteins. As a result, the immune system can identify and eliminate cancer cells more effectively.