The parents of a one-year old previously untreated boy with Haemophilia A, was treated with concentrate in July 1983 at the paediatric ward at the University Hospital of Wales, were not told by any of the treating clinicians that there was a risk of NANBH, even though Professor Bloom informed the GP a few days later that "all these materials carry the risk of hepatitis, particularly non-A non-B, but this is something haemophiliacs have to accept".