Why can't people with sjogren's donate organs, blood or bone marrow?

Autoimmune disease: Sjogren's is one of many autoimmune diseases. Organ donation would be very ill-advised since the likelihood that multiple organs are involved with autoimmune disorders is great. They also travel in clusters; for instance, where you have one autoimmune disorder, you are more likely to have another. While it's always awesome to want to donate organs and blood, donating disease is way less awesome :).