human 53 Article 52 Humans 43 genetics 43 controlled study 34 procedures 27 nonhuman 23 COVID-19 21 SARS-CoV-2 21 male 18 RNA 16 female 15 article 14 DNA 13 chemistry 13 metabolism 13 nucleic acid 13 sensitivity and specificity 13 Severe acute respiratory syndrome coronavirus 2 12 adult 12 coronavirus disease 2019 12 COVID-19 Nucleic Acid Testing 11 virology 11 Nucleic Acid Conformation 10 conformation 10 diagnosis 10 polymerase chain reaction 10 software 10 Computational Biology 9 DNA sequence 9