Add Yahoo as a preferred source to see more of our stories on Google. As the nation experiences what many experts believe is the second-largest wave of COVID infections since the pandemic started, ...

Scientists have identified a persistent change in a handful of blood proteins in people with long Covid that indicates that an important part of their immune system remains on high alert for months ...

The U.S. government is mailing out another round of free COVID tests to households that sign up. Older COVID tests still may be in your cupboard and OK to use, but you must verify the test’s ...

A team of scientists is proposing a new explanation for some cases of long COVID, based on their findings that serotonin levels were lower in people with the complex condition. In their study, ...

At-home tests that can tell you if you have the flu or COVID-19 are readily available this winter season. Many different brands are available at major pharmacies and retailers nationwide, as well as ...

Nothing puts a damper on your holiday plans like a positive COVID-19 test, am I right? But what if that line is, like, super faint? Do you still have COVID—or can you go ahead and attend your office ...

What's changed, and what hasn't, since President Donald Trump declared the U.S. emergency on March 13, 2020. At the time, nearly 2,000 Americans were infected with the virus. But at-home covid tests ...

Official says states told not to use plastic tubes supplied by Texas company. In what could be another blow to government efforts to ramp up coronavirus testing, federal officials said they are now ...