Practical Challenges Associated with Efanesoctocog Alfa (ALTUVIIIO) Prophylaxis in a 19-month-oldwith Severe Hemophilia AJessica N. Mistretta1, Maria G. Español1,2, Michael D. Tarantino1,2, Dane C. Christ1, Maureen D. Jones1,Jonathan C. Roberts1,21Bleeding & Clotting Disorders Institute, Peoria IL USA2Departments of Pediatrics and Medicine, University of Illinois College of Medicine at Peoria, Peoria, IL USA