The haemophilias comprise a group of life-long bleeding diseases of va
rying severity, whose main symptoms ore bruising and bleeding into joi
nts with consequent arthritis. Management of bleeds with clotting fact
or concentrates at first consisted of intermittent injections, usually
given at home, but is now moving towards continuous prophylactic trea
tment. This treatment has reduced the severity of symptoms, but at the
cost of introducing several viral infections, the most severe of whic
h are HIV (which leads to AIDS) and hepatitis, particularly hepatitis
C. Treatment is supervised by Haemophilia Centres, and management of a
n affected child at school should aim to allow normal physical activit
y. Although viruses capable of transmitting serious disease may be car
ried by some older children, they are not transmitted by normal school
activities and infected children do not pose a risk to others. The hi
story and function of the Haemophilia Society is described.