Interleukins are a group of proteins that play a crucial role in the immune system. They are produced by white blood cells and help regulate the body's response to infections and diseases. By sending signals between cells, interleukins help coordinate the immune response, ensuring that the body can effectively fight off harmful invaders like bacteria and viruses. There are many different types of interleukins, each with specific functions. For example, IL-1 is involved in inflammation, while IL-2 helps stimulate the growth of T cells, which are essential for immune defense. Understanding interleukins is important for developing treatments for various diseases, including autoimmune disorders and cancers.