Rutgers COVID-19 Cohort Study

Inclusion Criteria: * 20 years and older * Hospital and RBHS healthcare workers who have regular direct patient contact (≥3 patients/shift) in emergency rooms or inpatient settings that is expected to continue regularly over the next ≥3 months and who work ≥20 hours in the hospital weekly (residents, clinical fellows, attending physicians, nurse practitioners, physician assistants, registered nurses, license practice nurses, medical technicians, respiratory therapists, physical therapists, clinical pharmacists, dentists, dental hygienists, or dental assistants) * Hospital workers who do not have patient contact and non-healthcare from the Rutgers faculty, postdoctoral students, administrators, and staff. Exclusion Criteria: * Previous diagnosis with COVID-19 * Pregnant or have been diagnosed with a new medical condition in the past 30 days or have had a change in medications in the past 30 days * Participants who have been hospitalized in the past 30 days, had and had an emergency room, urgent care visit, or have had surgery. * Participants who have a fever on the day of their first visit to the study site (for consent, biospecimen collection, etc.).