What is Rheumatoid Arthritis?

Rheumatoid arthritis Rheumatoid arthritis (RA) is an autoimmune inflammatory disease mainly of the joints. The immune system is normally designed to attack foreign bodies like bacteria and viruses. In rheumatoid arthritis, the immune system abnormally attacks the joints causing inflammation and pain. Although the joints are the main targets in rheumatoid arthritis, many other tissues […]