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 .
Best Answer: No! An autoimmune disease is one where your own body's immune system attacks the body and causes inflammation etc.... HIV is caused by a virus. No, the auto in autoimmune means that the body attacks its own immune system. HIV is Human Immunodeficiency Virus. It is an alien (does not originate from the body) and destroys the host's immune system. The immune system becomes so weak that it can't defend the body against everyday bugs.