acquiredimmunodeficiencysyndrome aids(disease) congresses epstein-barrvirus genes geneticaspects genetics herpesgenitalis herpesviridae herpesviridaeinfections herpesvirus4 herpesvirus8 herpesviruses herpesvirusinfections herpesvirusvaccines hiv(viruses) human immunesystem immunologicalaspects immunology kaposi kaposi'ssarcoma latentvirusdiseases pathogenesis sarcoma simplexvirus viral viralgenetics wc571 wc571p2971994