Jie,
I forgot what I knew about this virus so I had to look it up here
http://cjasn.asnjournals.org/content/3/Supplement_2/S68.full (sorry I don't know how to link and you may have already read this article but I thought there is good information in there and it explains why your being treated as you are. Good for all transplant patients to read because this virus is far more prevalent in the first year than I realized.
Hope you have a smooth recovery from here on.
Ed