Armored Personal Carrier. I think the APC is located where you find the Warden Crossbow.
Autoimmune diseases arise from an overactive immune response of the body against substances and tissues normally present in the body. In other words, the body actually attacks its own cells. An immune disorder is when the body cannot defend itself. [ Source: http://www.chacha ....n immune disorder is when the body cannot defend itself. [ Source: http://www.chacha.com/question/what-is-the-difference-between-immune-disorders-and-autoimmune-diseases ]. More Answers to  What is the difference between immune disorders and autoimmune diseases .
A: Autoimmunity is an immune response directed to a substance (referred to as antigen) present in the body of the host. Q: What is autoimmune disease? A: It is a disorder caused entirely or in part by an autoimmune response. Q: How many autoimmune diseases are there? A: The National Institutes of Health has estimated that at least 80 human diseases are caused by primarily or secondarily by an autoimmune response. New diseases are being added to the list frequently.