AIDS--again.
D000163:Acquired Immunodeficiency Syndrome / Q000097:blood* / Q000635:transmission; D001782:Blood Donors; D017977:Deltaretrovirus / Q000302:isolation & purification; D006467:Hemophilia A / Q000097:blood*; D006801:Humans; D012306:Risk; D065227:Transfusion Reaction; D006113:United Kingdom; D014481:United States