Hi, I have had fibro and cfids for 10 years. I also come down with alot of viruses and infections. I was told by an Immunologist at Mass General Hospital that I have a high level of rheumatoid factor in my blood, but he dismissed it as not important. So too did Dr. Goldenberg, a renound specialist in arthritis and fibro. But I have heard other patients tell me this could be a valid sign of a serious autoimmune problem. Does anyone have any specific answers on this???!!