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Haemophilia
Haemophilia
(
also spelled
hemophilia
) is a group of
hereditary
genetic disorders
that impairs the body's ability to control
blood clotting
, which is used to stop bleeding when a
blood vessel
is broken.
Haemophilia A
(clotting
factor VIII
deficiency) is the most common form of the disorder, present in about 1 in 5,000–10,000 male births.
Haemophilia B
(
factor IX
deficiency) occurs in around 1 in about 20,000–34,000 male births.
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