This is a Post-Authorization Safety Surveillance (PASS) study designed to collect data on the safety and effectiveness of ADVATE reconstituted in 2 mL Sterile water for injection (SWFI) during routine clinical practice in children until 12 years of age. This surveillance study is a post-licensure commitment for ADVATE reconstituted in 2 mL SWFI.

Inclusion Criteria:

• Severe or moderately severe hemophilia A (baseline Factor VIII (FVIII) ≤ 2%)
• ≤12 years of age
• Participant's legally authorized representative(s) has provided written informed consent
• Participant is prescribed ADVATE and will only receive ADVATE reconstituted in 2 mL sterile water for injection (SWFI)
• Documented history of prior exposure to ADVATE
• Documented evidence of negative inhibitor test result during ≤10 EDs prior to study entry

Exclusion Criteria:

• Known hypersensitivity to the active substance or to any of the excipients
• Known allergic reaction to mouse or hamster proteins
• Participant has a requirement for a major surgical procedure at the time of enrollment
• Participant has no prior exposure to a FVIII concentrate
• Participant currently being treated with an immune tolerance induction (ITI) regimen
• Participant has been diagnosed with an inherited or acquired hemostatic defect other than hemophilia A (eg, qualitative platelet defect or von Willebrand disease)
• Participant has participated in another clinical study involving an investigational product (IP) or investigational device within 30 days prior to enrollment or is scheduled to participate in another clinical study involving an IP or investigational device or PASS registry during the course of this study

The study population will include 60 evaluable participants aged = 12 years with severe or moderately severe hemophilia A (Factor VIII (FVIII) = 2%) with documented prior exposure to FVIII concentrates.

Takeda provides access to the de-identified individual participant data (IPD) for eligible studies to aid qualified researchers in addressing legitimate scientific objectives (Takeda's data sharing commitment is available on https://clinicaltrials.takeda.com/takedas-commitment?commitment=5). These IPDs will be provided in a secure research environment following approval of a data sharing request, and under the terms of a data sharing agreement.

IPD from eligible studies will be shared with qualified researchers according to the criteria and process described on https://vivli.org/ourmember/takeda/. For approved requests, the researchers will be provided access to anonymized data (to respect patient privacy in line with applicable laws and regulations) and with information necessary to address the research objectives under the terms of a data sharing agreement.