Severity levels of hemophilia A

While severe hemophilia A is the most common, there are 3 forms: mild, moderate, and severe.¹

What are the severity levels of hemophilia A?

The severity of your hemophilia A is determined by the amount of working factor VIII in your blood. But no matter the level, bleeding can and does vary. This means someone with mild hemophilia A can bleed as much (or more) as someone with severe hemophilia A.¹

The 3 severity levels of hemophilia A explained¹

Mild Hemophilia A

of people with
hemophilia A

People with mild hemophilia A

have factor VIII levels of 6% to 49%
are generally diagnosed in adulthood
usually experience first bleeding episode from an injury, surgery, or tooth extraction

Moderate Hemophilia A