Hemophilia
Hemophilia referred to a group of medical disorders. 

The members of the House of Hanover, a former ruling family from Earth, often had hemophilia. In 2365, a member of Riva's chorus cited it as an example of a genetically passed on trait among the members of the ruling family, comparing it to Riva and his family's inability to hear. ()

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de:Bluterkrankheit
Medical conditions