My son underwent two liver transplants in September/October last year. He was discharged on Halloween '14 and has had 4 admissions for infections since then, obviously infections are common early post transplant, but the difference from before his transplants is how rapidly and dramatically they escalate. In two cases, within an hour of him vomiting for the first time, he's needing HDU care. His tac was halved the other day and he seems OK now, so is it likely he was over-immunosuppressed? And if so, is he likely to get less severe infections now his tac has dropped?