Get the facts on Rheumatoid Arthritis with this 100%-accurate animated video. Part of Focus Apps' Understanding Disease: Orthopedics series, the Rheumatoid Arthritis app demonstrates this complex inflammatory and autoimmune disease that affects the joints (predominately the small joints initially) and then spreads to other joints, tissues, and different parts of the body. Explore causes, risk factors, signs and symptoms, complications, screening and diagnosis, and treatment.