This study prospectively investigates the safety, FVIII immunogenicity, and hemostatic
efficacy of prophylactic HEMLIBRA® given with a concomitant low dose recombinant factor VIII
(rFVIII) known as NUWIQ®, in HA infants and children <3 years old who have had little to no
previous exposure to FVIII. In addition, the study investigates the safety and efficacy of a
novel FVIII ITI regimen in children <21 with existing low and high titer inhibitors (LTI and
HTI).