Study shines light on increased autoimmune disease in women

New research done at Stanford University could help explain why more women are prone to autoimmune diseases. Those include a broad range of disorders including rheumatoid arthritis, multiple sclerosis, lupus and psoriasis. The study found it appears this disparity may be linked to something called "X-chromosome inactivation", which is when the body shuts down activity on an X-chromosome as a defensive measure. KTVU's Alex Savidge and Jana Katsuyama speak with the senior author of the study, Dr. Howard Chang about how this reaction could lead to a higher number of autoimmune diseases among women.