During the 12-week treatment course, in addition to your study drug injections, you will visit the clinic every 3 weeks for physical exam and routine blood tests (2 tablespoons each). You will also have a blood test (1 tablespoonful) every week to find out if you are having a certain type of viral infection (cytomegalovirus, called CMV). If your blood tests show that your CMV blood levels are increasing, you may need treatment with anti-viral antibiotics to control your viral infection. You doctor will also give you antibiotics to take by mouth to prevent possible infections.