This is a multicenter, phase 4 prospective, single-cohort study in adult male and female volunteers hospitalized with COVID-19. Baseline nasopharyngeal swabs will be performed on all individuals. Halodine Nasal Antiseptic will then be applied to the anterior nares. Serial nasopharyngeal samples will then be collected at specified time points after the application. All samples will be tested for SARS-CoV-2 by real-time reverse transcription (rRT)-PCR assay.
