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 .
The first difference is that rheumatoid arthritis is an Autoimmune disease where the immune system attacks the cartilage in joints and surrounding leading to the joint eventua â¦ lly becoming disabled, and deformed it is the inflammation doing the actual damage.he first difference is that rheumatoid arthritis is an Autoimmune disease where the immune system attacks the cartilage in joints and surrounding leading to the joint eventua â¦ lly becoming disabled, and deformed it is the inflammation doing the actual damage.