Both the liquid that comes in the dropper with Covid tests and the test strips themselves can degrade over time, said Dr.

Advertising For example, Acon Labs, which makes Flowflex at-home tests ... You can check whether your test is truly expired by looking at the lot number and checking it against a list on the ...

COVID-19 antigen test manufacturers told CBS News that they are still delivering kits to the federal government through awards in previous years by ASPR, including additional contracts last year ...

"I think if it's the only option, it's better than nothing," said Ibrahim. She said if an expired rapid antigen test shows a positive result, the tester has COVID-19. However, an expired test can ...

In 1972, a pregnant woman had her blood taken, and doctors noticed that her red blood cells seemed to lack a surface marker, known as an antigen, that everyone else seemed to have. No one knew why.

Here's how we test every laptop that hits the bench at PC Labs using 24 different benchmarks. I’m one of the consumer PC experts at PCMag, with a particular love for PC gaming. I've played games ...