I was an early believer in the usefulness of at-home rapid COVID tests. Used correctly, they can decrease the spread of COVID-19. The Biden administration announced last week that free tests will once ...

At-home COVID-19 tests have become commonplace for many households, but knowing when exactly to take a rapid test — or when to throw old ones out — isn't always straightforward. Here's what health ...

If you've ever taken an at-home diagnostic test for COVID-19, you can partially credit the technology to the Johns Hopkins University Center for Innovative Diagnostics for Infectious Diseases (CIDID).