Researchers have used CRISPR to enhance cancer-fighting immune cells inside mice, with the cells able to track and eliminate tumors. The process involves reprogramming immune cells within the body to fight cancer, potentially leading to a new cancer treatment. The specifics of the treatment and its potential applications are still being explored, with some outlets suggesting it could be administered via a single injection, while others mention unrelated factors, such as coffee, that may have some connection to the research.