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).

If there was one thing we learned from COVID, it was the need for rapid, accurate, point-of-care testing to help contain the virus before it had spread silently to many others. It was years before we ...