Inclusion Criteria:  Must be 21 years old or older. Must be able to provide finger stick and venous whole blood samples. Must be able to understand and sign a consent form. Must be able to provide an additional sample(s) required by the study site for an additional FDA EUA authorized antibody testing (ELISA, CMIA, or other antibody test). Has an immediate need to determine COVID-19 status for occupational purposes. Was exposed to a COVID-19 patient within 7 days that leads the healthcare provider to suspect the individual of possibly having SARS-CoV-2 infection. Has symptoms that lead the healthcare provider to suspect the individual of possibly having SARS-CoV-2 infection. Has had a positive FDA EUA authorized PCR test between 1-28 days with or without symptom expression. Individuals who have tested positive for COVID-19 infection and have antibodies detected must have agreed to participate in the MCW Tissue Bank COVID-19 banking project.  Exclusion Criteria:  Is receiving treatment with infusion of convalescent plasma or other antibody therapy related to SARS-CoV-2 infections. Tested negative for COVID-19 by PCR more than 7 days ago. Is participating in a SARS-CoV-2 vaccine study.or received any doses of the available SARS-CoV-2 vaccines. Previously tested positive for COVID-19 at any point in time (for asymptomatic patients enrolling in the negative patient population).