There are some rapid tests you might be able to take past the expiration date on the box. Here's what to know. NBC Universal, Inc. At-home COVID-19 tests have become commonplace for many ...

What I'm most excited about are these rapid tests, the antigen tests. They look for a protein fragment of the coronavirus, and they give you the results in 15 minutes. They're not as accurate as ...

Rapid tests are usually reliable for long-standing infections, but are sometimes unable to detect recent HIV infections acquired in the past few weeks. Many tests are based on older ‘second-generation ...

While none of the free COVID-19 tests being shipped by the U.S. Postal Service this year will have already expired, officials acknowledge many now arriving in mailboxes will likely see their shelf ...

The best at-home COVID-19 tests are FDA-authorized, easy to use, accurate, deliver fast results, and also detect other viruses like the flu. Lauren Paige Richeson is a health writer and commerce ...

These antigen tests, often called rapid tests, detect proteins called antigens from the virus that causes Covid-19. They can provide positive or negative test results within minutes in your own home.

If viral antigens are present, that means you're likely infected. To detect these antigens, rapid tests have paper-like strips coated with specially engineered antibodies that function like a ...

Lateral flow tests are now part of life for much of the UK. Billions of pounds of public money have been spent on test kits. Has it all been worth it? Earlier this week, 38-year-old Hailing ...

Testing your DNA is easier than ever with an abundance of at-home DNA tests on the market. All you need to do is provide a simple DNA sample to learn more about your heritage and family history.

Take this test to see where you fall on the optimism/pessimism continuum. This test is made up of two types of questions: scenarios and self-assessment. For each scenario, answer according to how ...

Write it Out Audio (7:38) Get rid of worries before the exam - A guided practice that clears out worries from the mind; research shows it has increased test performance by at least 5 points. Walk Off ...