It was a file name like any other on a Tuesday afternoon—until it wasn’t.

They agreed to run a virtual validation. Kettering had anonymized HLA data from 10,000 transplant patients. Maya wrote a script to simulate the “Fresh Supply” protocol on a subset—just in silico, just predicting rejection probabilities.

Predicted rejection rate without protocol: 68% (for mismatched donors). Predicted rejection rate with protocol (v1.9.10): 0.4%.

Maya’s secure phone buzzed. A text from an unknown number:

If this was real, it was the Holy Grail of transplant medicine.