Most existing COVID-19 tests "rely on the same principle, which is that you have accumulated a detectable amount of viral material, for example, in your nose," says study lead author Frank Zhang, who ...

Determining whether you have a cold, the flu or Covid-19 might be getting a little easier soon. On Friday, the U.S. Food and Drug Administration authorized the first over-the-counter combination test ...

So when and how should you use them? By Dani Blum Yet again this winter, millions of Americans will wonder if a nagging cough or body aches is a sign they’re coming down with Covid or the flu. This ...

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Molecular tests are far superior to rapid antigen tests—and now you can get them for home use. Amanda Blum is a freelancer who writes about smart home technology, gardening, and food preservation.

The CLINITEST Rapid COVID-19 Antigen Self-Test has received FDA EUA for unsupervised self-testing for the SARS-CoV-2 virus by individuals age 14 and older (or adult-collected samples from individuals ...

Experts expect cases to rise again this winter. Here’s the latest on symptoms, treatments and testing. By Dani Blum Dani Blum has reported on Covid since the spring of 2020. There are few constants ...

Astronomers and physicists have long used a laser-based sensor called an “optical frequency comb” to study the material makeup of the cosmos and to make timekeeping more accurate. But the COVID ...

People are urged to get COVID-19 tests when they feel sick and in other situations, according to the latest health advice. Annie Spratt via Unsplash These days, feeling sick may make you consider ...

Covid rates are still rising across most of the country, fueled by the highly contagious new variants of the virus — KP.2 and KP.3 and LB.1. As of July 18, the highest levels of Covid are in the ...