human 540 Humans 462 female 228 male 224 adult 185 article 177 Article 168 Female 151 Male 144 controlled study 132 Galaxies 101 procedures 100 Stars 98 Adult 94 COVID-19 94 genetics 85 adolescent 80 major clinical study 78 Adolescent 77 child 76 aged 70 Child 69 SARS-CoV-2 64 Animals 61 United States 61 animal 60 coronavirus disease 2019 54 pandemic 54 randomized controlled trial 54 young adult 54