Because of low testing uptake, slow accrual at participating health centers and continuously changing COVID pandemic, research investigators had to terminate the original study and consider alternate strategies.

As part of National Institutes of Health Rapid Acceleration of Diagnostics-Underserved Populations (RADx-UP) program, the goal of the RADxUP study is to develop, test, and evaluate a rapid, scalable capacity building project to enhance COVID-19 testing in three regional community health centers (CHCs) in San Diego County, California. In collaboration with CHC partners, their consortium organization, Health Quality Partners (HQP), investigators are pursuing the following Specific Aims: 1) Compare the effectiveness of automated calls vs text messaging for uptake of COVID-19 testing among asymptomatic adult patients with select medical conditions and those 65 years of age and older receiving care at participating CHCs. Secondarily, investigators will invite all study participants to receive flu vaccination and will assess feasibility and acceptability of study participants to refer adult family household members who are essential workers for COVID-19 testing. 2) Gather patient, provider, CHC leadership, and community stakeholder insights to establish best practices for future scale-up of COVID-19 testing sustainability and vaccination.

Pronounced inequities and disparities in coronavirus disease (COVID-19)COVID-19 morbidity and mortality have been reported, largely due to comorbid conditions and social determinants of health. Approximately 95% of COVID-19 related deaths occur among individuals with underlying medical conditions. Of all racial/ethnic groups, Hispanic/Latino communities in San Diego County have experienced the greatest burden of COVID-19 disease and deaths. Furthermore, testing challenges to date are evident, including long turnaround of test results and longer waiting times for African American and Hispanics compared to whites. The goal of this community-engaged proposal is to develop, test, and evaluate a rapid, scalable capacity building project to enhance COVID-19 testing in three regional community health centers (CHCs) in San Diego County. In collaboration with CHC partners, their consortium organization (Health Quality Partners), and community stakeholders, investigators propose the following Specific Aims: 1) Compare the effectiveness of automated and live prompts and reminders and their combination for uptake of COVID-19 testing among adult patients with select medical conditions or those 65 years of age and older receiving care at participating CHCs. Secondarily, investigators will invite all study participants to receive flu vaccination and will assess feasibility and acceptability of study participants to refer adult family household members who are essential workers for COVID-19 testing. 2) Gather patient, provider, CHC leadership, and community stakeholder insights to establish best practices for future scale-up of COVID-19 testing sustainability and vaccination. This community-engaged project includes underserved (socioeconomically disadvantaged and large proportion of Hispanic/Latinos) as well as COVID-19 vulnerable individuals (patients with medical comorbidities and 65 years of age and older). The approach considers regional COVID-19 morbidity and mortality disparities to identify strategies to address disproportionate infection rates and follow-up. By working in partnership with health care providers, health care system leaders, and community stakeholders, the research team has the potential to build the evidence-base approaches and identify sustainable solutions to understand and address the current and future pandemics in underserved and vulnerable populations.

Inclusion Criteria:

• Eligible participants will include asymptomatic men and women receiving care at participating community health centers with at least one clinic visit in the last year, age 21 years and over, with co-morbid conditions deemed by the Centers for Disease Control and Prevention to increase risk for severe COVID-19 illness, including heart failure, coronary artery disease, cancer, chronic kidney diseases, COPD, obesity, sickle cell disease and type 2 diabetes mellitus, and those 65 years of age and older.

Exclusion Criteria:

• Under age 21, inability to communicate in English and other study languages, inability to complete anterior nasal swab sampling for COVID-19

Because of extremely low testing uptake, slow accrual at participating health centers and continuously changing COVID pandemic, our team was forced to terminate the intervention study and pivot to alternate strategies. Because the study was terminated with extremely small number of participants, the adverse events were not monitored/assessed,

Because of extremely low testing uptake, slow accrual at participating health centers and continuously changing COVID pandemic, our team was forced to terminate the intervention study and pivot to alternate strategies. Because the study was terminated with extremely small number of participants, the adverse events were not monitored/assessed,

Because of extremely low testing uptake, slow accrual at participating health centers and continuously changing COVID pandemic, our team was forced to terminate the intervention study and pivot to alternate strategies. This would allow us to continue our efforts to deliver as many COVID-19 tests as possible to help limit the spread of COVID-19 in underserved communities.