IgG/IgM Antibody Test in Patients Who Have Tested Negative or Positive for COVID-19 With the Standard Method of COVID19 Testing.

Inclusion Criteria: * Received confirmed COVID-19 positive or negative test from Sharp HealthCare's standard method of testing. * Age \>/=18 years old. * Access to a phone in the hospital room or an electronic device that is capable of receiving phone calls and/or video calls and/or e-mail. * Able to read/write/speak English or Spanish fluently. * Subjects must have the ability to understand the requirements of the study, provide informed consent, and provide authorization of use and disclosure of personal health information. * Hospitalized at the time of consent or recently discharged with leftover blood stored at hospital laboratory Exclusion Criteria: * Impaired cognitive or decision-making capacity (based on the clinical judgment of the PI or designee)