pandemic(6) quarantine(4) observational study(4) Cohort(4) Study design(4) Predictive(4) false negative results(4) SARS-CoV-2(4) outcome(4) Prevalence(4) nasopharyngeal swabs(4) RT-PCR test(4) positive(4) healthy(4) cross-sectional(4) Predictive value(4) Viral(4) False positive(4) subject(4) mitigate(4) virus(4) Nasopharyngeal swab(4) Research(4) Covid-19, quarantine, military, motivating interview, PCR-test(4) contagious(4) explain(4) risk(4) Spread(4) Sensitivity and specificity(4) False negative(4)