This website is all about the immune system. The Immune System is one of the most important systems of the body for our body to function correctly. The major functions of the Immune System are to create antibodies and to fight against illnesses and keep us healthy and alive. This system is important because it keeps us healthy and alive. Also, it allows us to not be sick if functioning correctly. It is very important and it is my favorite system!! So, explore your healthy side!