A paper (together with the draft AIDS donor leaflet) was sent to Lord Glenarthur, which referred to increasing evidence that AIDS may be transmitted by the transfusion of blood, blood products which may also transmit AIDS where those with haemophilia were at particular risk, and the belief that there may be under-reporting of cases. The paper concluded that although there was no conclusive evidence, it seemed very likely that AIDS was caused by an as yet unidentified virus.