The papers in this special section focuses on the major interrelated components of Rapid Acceleration of Diagnostics (RADxSM) Tech, a National Institutes of Health (NIH)-funded program launched on April 29, 2020 to accelerate development, validation, and commercialization of innovative point-of-care and home- based tests, as well as improvements to clinical laboratory tests, that can directly detect SARS-CoV-2, the virus that causes COVID-19.