A Research Study Looking at Long-term Treatment With Mim8 in People With Haemophilia A (FRONTIER 4)

Inclusion Criteria:

1. Informed consent obtained before any study related activities. Study relatedactivities are any procedures that are carried out as part of the study, includingactivities to determine suitability for the study.

2. Male or female with diagnosis of congenital haemophilia A based on medical records

3. Ongoing participation in study NN7769-4513, NN7769-4514, NN7769-4516, or NN7769-4728at the time of transfer. Participant should qualify either of the followingcriteria:

4. Participant from study NN7769-4513, who has participated in the extension partof the study for at least 12 weeks prior to enrolment in study NN7769-4532, or,

5. Participant has completed the end of treatment visit for study NN7769-4514,NN7769-4516 or NN7769-4728.

6. Participant and/or participant's parent(s)/participant's Legally acceptablerepresentative (LAR) willingness and ability to comply with scheduled visits andstudy procedures, including the completion of diary.

Exclusion Criteria:

1. Any disorder, except for conditions associated with haemophilia A, which in theinvestigator's opinion might jeopardise participant's safety or compliance with theprotocol.

2. Participant who has discontinued or been withdrawn from studies NN7769-4513,NN7769-4514, NN7769-4516, or NN7769-4728.

3. Previous participation in this study. Participation is defined as signed informedconsent.

4. Female who is pregnant, breast-feeding or intends to become pregnant.

5. Female of child-bearing potential and not using a highly effective contraceptivemethod (highly effective contraceptive measures or as required by local regulationor practice).

6. Participation (i.e., signed informed consent) in any interventional, clinical study (except from study NN7769-4513, NN7769-4514, NN7769-4516, or NN7769-4728) of anapproved or non-approved investigational medicinal product.

7. Any planned major surgery, during part 1 of the study.

8. Mental incapacity, unwillingness to cooperate, or a language barrier precludingadequate understanding and cooperation.