While you may be used to thinking of COVID tests as interchangeable, there’s a big difference between the standard at-home antigen test and a PCR (molecular) test. Almost five years in, it’s important ...

There are three different ways to test for COVID-19: PCR tests, antigen tests and antibody tests. Here are the differences.

The accuracy of the RT-PCR test depends on timing; tests are best given within 10 days of COVID-19 symptom development.

When you think about getting tested for COVID-19, you’re most likely picturing two types of tests: the at-home rapid antigen tests you can buy at the drugstore and the PCR test where the results ...

Researchers investigated how antigen concentration and viral load in different specimen types affected the performance of SARS-CoV-2 rapid diagnostic tests (RDTs).

If someone has telltale COVID-19 symptoms but keeps testing negative on antigen tests, they may want to get a PCR test to be absolutely sure they don’t have the disease.

Testing experts explain the latest data surrounding the accuracy of at-home rapid antigen testing for COVID-19.

What is a polymerase chain reaction (PCR) test? Here, we describe how the tests work and why health experts and researchers use them.

Researchers have demonstrated that an infected individual will test positive on a PCR test one to two days before an antigen test.