Autoimmune disease is a condition in which the body’s immune system mistakes its own healthy tissues as foreign and attacks them instead of defending. It could be within the body of the individual or host, termed self-antigen, or from outside, called foreign antigen like the virus, bacteria, toxin, etc. The body's immune response can be categorized into 2 types: innate and adaptive. Innate response is rapid and transient, whereas adaptive, on the other hand, is slow and may take a longer time to respond, but the effect is generally long lasting as it carries memory with it.
Symptoms of autoimmune illnesses can be mild or severe and episodic. There are more than 100 autoimmune disorders that we are aware of, and these affect almost any organ in the body such as the muscle, joint, skin, abdominal organs, digestive, nervous system, kidneys, blood vessels, and salivary glands. Some of the common autoimmune diseases that are quite familiar to the public are Type 1 Diabetes Mellitus, Vitiligo, Psoriasis, Myositis, Multiple Sclerosis, Vasculitis, etc.
