What does a low wbc count mean for a kidney and pancreas transplant patient?

Usually nothing: Very low count might be due to med or underlying disease or other.

Depends: It depends on the cause.

Depends: My first thought would be something related to your immunosuppression. You should be actively involved with your transplant team to uncover the exact etiology of this problem.

Low WBC: Low WBC after transplantation is very common as a consequence of the various immunosuppressive agents (particularly Mycophenolate Mofetil and azathioprine) and antiviral medicines (such as gancyclovir and acyclovir) which are myelosuppressive. Low wbc, particularly low neutrophil count, can be very dangerous, so consult with your transplant specialist.