This is interesting. I just did some research and, from what I can tell so far, organ-transplant experts (including the American Society of Transplantation) generally caution against getting a COVID vaccine for at least one month post-transplant. They would like you to get it two weeks ahead, but...they have no data on the interaction of transplants and the vaccine. All they can say is "It should be all right, we guess?" and hope that you'll sign up for Johns Hopkins' current study to confirm it after it's already too late.

This isn't science.