Our body is protected by a barrier called immune system, which helps fight against outer agents like bacteria, virus, etc. and keeps you healthy. This system is balanced by many processes inside and outside, including environment, food, hormone, gene, etc. in order to maintain your health.
If some elements get damaged, they will lead to an out-of-control immune system. It means your body will overreact with everything. The antibodies and chemicals will be released to fight with any types of proteins that your body considers as “stranger”. However, sometimes this ravage would be so hard that even proteins in your inner organs are involved. That is called autoimmune disease and becoming more and more popular.
Rheumatoid arthritis is considered to be the most common autoimmune disease. This book would offer you some basic information about rheumatoid arthritis.