How to check if your COVID-19 at-home test kit is usable That test you picked up months ago may have an extension on its expiration date, according to the FDA.

The U.S. Postal Service’s mission to deliver 500 million coronavirus test kits has cast it in an unprecedented role in the nation’s pandemic response just as covid-19 infections have peaked ...

All three were detected in Delta, but when Omicron first came out, or BA.1, the test didn't detect the spike target, so it was easy to figure out what was Omicron and what was Delta.

Antigen rapid Covid-19 testing at home has been available for months, but getting your hands on the kits hasn’t always been easy. Recently, the Biden administration has made four free test kits ...

Some of the coronavirus test kits shipped to labs across the country are not working as they should, the US Centers for Disease Control and Prevention said.