Inclusion Criteria:  Male or female ≥21 years of age at the time of informed consent Has a positive screening test for SARS-CoV-2 by RT-PCR Is asymptomatic for COVID-19 on the day of their positive screening test (may have symptoms on the actual day of study enrollment) Is expected to remain at the study site for the full 6-day study period Willing and able to complete all study required procedures Provision of signed and dated informed consent form  Exclusion Criteria:  History of frequent or difficult to control nosebleeds within the 14 days prior to study participation If, at the discretion of the Investigator, involvement in the study is likely to jeopardize the subject's health or their current or future medical treatment