Inclusion Criteria:  Be enrolled in La Frontera; report not having ever been tested for COVID-19 outside of La Frontera; not having had any vaccinations against COVID-19 Provide consent for release of medical records with the study team Provide consent to share de-identified data with the RADxUP Data Coordinating Center at Duke University  Exclusion Criteria:  Not enrolled in La Frontera participant; Report having been tested for COVID-19 outside of La Frontera; Have had any vaccination against COVID-19 Do not provide consent for release of medical records with the study team Do not provide consent to share de-identified data with the RADxUP Data Coordinating Center at Duke University