Quest Diagnostics is a leading provider of independent diagnostic testing in the United States thanks to its network of roughly 2,300 patient service centers across the country. We think the company's ...

Narrow-moat Quest Diagnostics posted another quarter of outsized performance thanks to COVID-19 tailwinds, but with softening demand already occurring, we’re leaving our fair value estimate unchanged ...

Add Yahoo as a preferred source to see more of our stories on Google. Covid-19 at home Rapid Test Kit The FDA has extended the shelf life for some COVID-19 tests. Now that allergy season is here, many ...

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 ...

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 ...