When you see an immune response in your arm, it's going to be a different cast of characters than if you see an immune response in your lungs," Pepper said.The immune system "is like lots of different ...

There's still a lot of confusion around the best time to take a COVID test and where to get them. Here, experts share their ...

At-home Covid tests can be ordered for free starting Monday. Households can now order four free tests for home delivery at COVIDTests.gov. According to the government website, orders will begin ...

Covid-19 was never just another cold. We knew it was going to stick around and keep changing to try to get the upper hand on our immune systems. But we've changed, too. Our B cells and T cells, ...

While an increasingly anxious world watched a new coronavirus spread across the globe in early 2020, veteran immunologist Rafi Ahmed quickly grasped that his field was about to experience something ...

The U.S. Food and Drug Administration has provided a tool for individuals to use to confirm if FDA-authorized at-home over-the-counter COVID-19 diagnostic tests that are beyond the expiration date ...

The FDA has extended the shelf life for some COVID-19 tests. Now that allergy season is here, many are finding themselves with symptoms asking: Is it allergies or a cold? COVID? Something else? Since ...

On December 18, a San Diego emergency room nurse was given a shot of the COVID-19 vaccine. A week later, he tested positive for the virus, CNN affiliate KGTV reported. Stories like this will become ...

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 ...