Investigators will carry out validation of a laboratory assay to detect SARS-CoV-2 nucleic acids in human saliva samples. Data for the validation will include the test results from standard nasopharyngeal (NP) swabs (controls) AND matched saliva samples (experimental group) of individuals who are either known to be infected or at high risk of being infected. Investigators hypothesize that the performance of an assay designed specifically for saliva will not perform differently, as defined by a predetermined margin, from the standard assay performed on NP and other respiratory samples
