Ohhh, and part of the reason why is that the transplanted person is at first on a hgh dose of anti-rejection meds, so white blood cell count is low an at a higher risk of infection. As time goes on the anti-rejection regiment is adjusted to lower doses that better suit the individual, which in sum cases takes months. All the while labs are needed and depending on the center, the persons labs, labs maybe needed every week/ every two weeks/ monthly/ and then wth some centers it is fnally every three months.