Letter from Dr Chris A. Ludlam, The Royal Infirmary of Edinburgh (RIE), to Dr. D. Brian. L. McClelland, Scottish National Blood Transfusion Service (SNBTS), re Mr. [GRO-A] found HIV positive 11th October 1984, enquiry whether blood donors who contributed donations that Mr. [GRO-A] received are now known to be anti-HIV positive