I'm 2.5 year out from a liver and kidney transplant. I'm on 4mg of tac a day. I'm also on Insulin and BP meds, as well as Gabapentin for neuropathy. I had zero antibodies after 2 FULL Moderna shots, however after 4 Full shots I requested a titer test and I now do have a high level of antibodies. I'm 70 years old. I hope this information helps others. BTW I also had Carotid artery surgery and a double bypass after my transplant and I feel great.