Rapid antigen tests can be useful to determine if you have an infection, but the timing and frequency could be key for accurate results.

Early indications suggest rapid tests work to detect Omicron but only if you take them when your viral load is high.

At-home tests and the omicron variant When the omicron variant emerged in late November 2021, scientists quickly responded to determine how PCR and rapid tests performed against this new variant.

Rebecca Heilweil covered emerging technology, artificial intelligence, and the supply chain. Should we be swabbing our noses or our throats for at-home tests? Do rapid tests even detect omicron at ...

How do rapid antigen COVID-19 tests work? Why did the US government just pledge to buy 280 million of them? And is that even enough to help curb the spread of the virus?

With new COVID cases on the rise, taking an easy-to-get rapid test can give you quick results. Most of the time, though, a test after 3 to 5 days of symptoms gets a reliable result.

I tested myself for COVID-19 from the comfort of my bedroom. I had never taken a rapid test before, but the instructions were easy to follow. Rapid antigen tests are convenient, but they're not as ...

Rapid tests work to detect omicron and its subvariants but timing is tricky. If you have COVID-19 symptoms, such as fever, cough, congestion or a sore throat, test yourself immediately but know ...

Rapid antigen tests, better known as RATs, have become an important tool in Australia's arsenal against COVID-19. While PCR tests are still available — and remain the "gold standard" for testing ...

As the Omicron variant spreads, regular home testing can lower risk, ease worry and allow you to live a more normal life.

At-home coronavirus tests are becoming scarce amid the omicron surge. Here's where to look, and what to do if you can’t find one.