On Jul. 22, 2020, In a paper in the New England Journal of Medicine, scientific leaders from the National Institutes of Health set forth a framework to increase significantly the number, quality and type of daily tests for detecting SARS-CoV-2, the virus that causes COVID-19, and help reduce inequities for underserved populations that have been disproportionally affected by the disease.

Current testing methods to diagnose COVID-19 detect either viral RNA or viral antigens. These tests are highly sensitive and specific when conducted in centralized laboratories with standardized protocols, but require a large amount of lab space, complex equipment, regulatory approvals for the laboratory operations and skilled technicians. Results may take hours to days, and samples often need transport to a central laboratory, furthering delays. During that time someone who is unknowingly carrying the virus may go on to infect others, instead of being quickly isolated.  These issues highlight the need for reliable, rapid, point-of-care testing diagnostics.

RADx includes four major components to enable approximately 6 million daily tests in the United States by December 2020, many times the current daily testing rate. In the near term, RADx confronts the pandemic by expanding testing capacity by fall 2020 as the nation faces the beginning of seasonal flu.  In the slightly longer-term RADx aims to produce additional innovative diagnostic technologies and strategies for making testing available to diverse, vulnerable and underserved populations.