nonhuman human 142 Humans 108 Article 103 controlled study 91 female 69 male 66 adult 60 article 48 Female 43 Animals 42 major clinical study 41 Human immunodeficiency virus infection 40 animal 40 Male 39 HIV Infections 37 Human immunodeficiency virus 37 genetics 32 Adult 29 adolescent 26 procedures 26 virology 26 COVID-19 25 SARS-CoV-2 25 coronavirus disease 2019 25 unclassified drug 24 priority journal 23 Adolescent 22 Severe acute respiratory syndrome coronavirus 2 22 isolation and purification 22