A Research Study Looking at How Different Doses of Study Medicine (Inno8) Work in the Body of People With Haemophilia A

Inclusion criteria

• Male
• Age 18-64 years (both inclusive) at the time of signing the informed consent.
• Body weight greater than or equal to (≥) 45 kilograms (kgs).
• Diagnosis of congenital haemophilia A with factor VIII (FVIII) activity less than or equal to (≤) 15 percentage (%) with or without FVIII inhibitors, based on medical records.

Exclusion criteria

• Current or prior exposure to any prophylactic treatment for haemophilia A within 5 half-lives of the medicinal product by the time of screening.
• Body mass index ≥30.0 kilogram per square meter (kg/m^2).
• Increased risk of thrombosis, e.g. known history of personal or first-degree relative(s) with unprovoked deep vein thrombosis.
• Any clinical signs or established diagnosis of venous or arterial thromboembolic disease.
• Any known coagulation disorders other than haemophilia A.
• Ongoing or planned immune tolerance induction therapy.
• Presence of clinically significant gastrointestinal disorders potentially affecting absorption of drugs and/or nutrients, as judged by the investigator.