The U.S. has 2.1 million people. It usually develops between the ages 30 and 50. It can also develop at any age. Rheumatoid arthritis is an autoimmune disease. It is a chronic condition that is triggered by the immune systems. Autoimmune diseases occur when tissues in the body are mistakenly attacked by the body's immune system. The immune system is composed of complex cells and antibodies that are designed to destroy bacteria and other invaders.Joint Inflammation
This can cause…
