PRP-T Views 2 meanings found PRP‑T refers to the Hib vaccine that combines polyribosylribitol phosphate with tetanus toxoid to protect against Haemophilus influenzae type b infections. Medical PolyribosyRibitol Phosphate conjugated with Tetanus toxoid Polyribosylribitol Phosphate-Tetanus Conjugate (Hib) Vaccine