Article COVID-19 Humans MALAT1 NEAT1 Nasopharynx SARS-CoV-2 Saliva Severe acute respiratory syndrome coronavirus 2 adult controlled study coronavirus disease 2019 disease severity gene expression human human tissue lncRNA long untranslated RNA long untranslated RNA MALAT1 long untranslated RNA NEAT1 nasopharyngeal samples nasopharyngeal swab nasopharynx nonhuman protein expression real time polymerase chain reaction receiver operating characteristic saliva saliva analysis unclassified drug