Antigen tests can identify the presence of antigens within the body, which are substances that cause immune responses, such as the release of antibodies. The immune system, and antibodies specifically ...

Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...

A PCR test is often considered the gold standard for detecting coronavirus infection. It’s the test some employers want employees to take before returning to work after having Covid-19, and the one ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Ellen Lee Ellen Lee is a writer focused on parenting and health gear. She has ...

The Food and Drug Administration (FDA) has cleared ACON Laboratories’ Flowflex COVID-19 Antigen Home Test, the first over-the-counter (OTC) antigen test. Previously, the test was authorized for ...

In a recent study posted to the medRxiv* server, a team of researchers investigated how antigen concentration and viral load in different specimen types affected the performance of severe acute ...

You can now buy rapid antigen tests in supermarkets and pharmacies to test yourself at home for COVID-19 in about 15 minutes. You’ll get your results much sooner than standard PCR tests, which most of ...

Many of us have taken a rapid antigen test (RAT) or have administered them to our school-aged children. But how many of us are using them correctly? Here are 15 pitfalls to avoid if you want to get ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. In the age of COVID-19, as multiple variants have spread across the ...

It's a common scenario for anyone who has tested positive for COVID-19 and spent several days in isolation. You’ve tested positive for COVID, done the responsible thing and isolated. Now it’s day 5, ...

With Omicron surging in the United States, many people are taking COVID-19 tests to see whether they test positive. Most people will take either a rapid antigen or PCR test. Though the PCR test is ...