Thanks to the aforementioned analysis, the current PGx biomarker spectrum in Greece spans across many medical specialties, such as oncology (CYP2D6, TPMT, DPYD), psychiatry (CYP2D6, CYP2C19), cardiology (CYP2D6, CYP2C9, VKORC1, SLCO1B1), and infectious diseases (CYP2B6) [14]. This evidence concerns the gene TPMT and infectious disease.