Today, as one of the world's leading biopharmaceutical companies, Pfizer's purpose is Breakthroughs that change patients' lives: discovering, developing, and delivering medicines and vaccines that address unmet need, earn trust through quality and integrity, and reach patients through strong partnerships across the healthcare system. Patient impact in rare disease: Support appropriate diagnosis, referral to Hemophilia Treatment Centers (HTCs) where applicable, initiation, and persistence by engaging hematologists, HTC multidisciplinary teams, and allied care partners involved in bleeding disorder management.