D for diagnosis and E for everything else.
De Cock
Kevin M
KM
D016915:AIDS Vaccines; D000163:Acquired Immunodeficiency Syndrome / Q000175:diagnosis / Q000517:prevention & control; D002944:Circumcision, Male; D003140:Communicable Disease Control / Q000379:methods*; D005260:Female; D015658:HIV Infections / Q000175:diagnosis* / Q000517:prevention & control; D006801:Humans; D008297:Male; D014944:World Health Organization / Q000458:organization & administration*
D016915:AIDS Vaccines