A member asked:

My lady friend has christmas disease. she was too embarassed to tell me any more. can you explain it to me please?

A doctor has provided 1 answer

Haemophilia B: Haemophilia b (or hemophilia b) is a blood clotting disorder caused by a mutation of the factor ix gene, leading to a deficiency of factor ix. It is the second most common form of haemophilia, rarer than haemophilia a. It is sometimes called christmas disease after stephen christmas.

Answered 1/1/2021

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