Interferon-gamma is a type of protein produced by the immune system, specifically by T cells and natural killer cells. It plays a crucial role in fighting infections and diseases by enhancing the ability of macrophages to destroy pathogens. This protein also helps regulate the immune response, making it vital for maintaining overall health. In addition to its role in fighting infections, interferon-gamma is important in the context of certain diseases, such as cancer and autoimmune disorders. Researchers are studying its potential therapeutic uses, as it may help boost the immune system's ability to target and eliminate abnormal cells, offering hope for new treatments.