Inclusion Criteria:  Male or Female, 18 years of age or older Present for elective, outpatient COVID-19 RT-PCR testing Meet the FDA EUA approved indications for use for the RT-PCR nasal swab test for COVID-19 Stated willingness to comply with all trial procedures and availability for the duration of the trial Informed consent must be obtained prior to testing  Exclusion Criteria:  Less than 18 years of age Unable to cough voluntarily Present with acute traumatic injury to the head, neck, throat, chest, abdomen or trunk Patent tracheostomy stoma Recent chest/abdomen/trunk trauma or surgery, recent/persistent neurovascular injury or recent intracranial surgery Medical history of cribriform plate injury or cribriform plate surgery, diaphragmatic hernia, external beam neck/throat/maxillofacial radiation, phrenic nerve injury/palsy, radical neck/throat/maxillofacial surgery, vocal cord trauma or nodules Since persons with aphasia may have difficulty in producing an FCV-SDS in the time allotted by the app, this population also will be excluded from the current trial