canada National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine research support non-u.s. gov't saliva real-time polymerase chain reaction affs=[] is_editor=false suffix=none equal_contrib=false) initials='a' initials='n' initials='w' initials='k' initials='d' affs=[]) initials='s' initials='m' lastname='muller' author(firstnames='david' initials='r' author(firstnames='daniel' initials='v' initials='t' author(firstnames='robert' author(firstnames='mario' author(firstnames='matthew' covid-19* sars-cov-2* equal_contrib=false)] author(firstnames='anne' lastname='chen' author(firstnames='neil' lastname='rose' author(firstnames='tony' pmid:32584972 pmc7337630 doi:10.1093/cid/ciaa848 alainna j jamal mohammad mozafarihashjin collabauthor(name='toronto invasive bacterial diseases network covid-19 investigators' investigators=[author(firstnames='brenda l' lastname='coleman' initials='bl' author(firstnames='danny' author(firstnames='nataly' lastname='farshait' author(firstnames='wayne' lastname='gold' author(firstnames='christopher e' lastname='kandel' initials='ce' author(firstnames='kevin' lastname='katz' lastname='kozak' lastname='mazzulli' lastname='opavsky' lastname='ostrowski' author(firstnames='agron' lastname='plevneshi' lastname='rau' lastname='ricciuto' lastname='richardson' author(firstnames='valerie' lastname='sales' author(firstnames='sharon' lastname='walmsley' nasopharynx