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

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 ...

At-home rapid tests for COVID-19 are more convenient. But experts say there are still times when a PCR test is useful.

Rapid, or antigen tests, are more commonly referred to as at-home COVID tests. Samples for a rapid test are usually taken by nasal swab, and results are generally produced between 15-30 minutes.

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

MORE: Doctors rush to understand COVID-19's second-week crash An accurate, FDA-authorized antigen test could be a "breakthrough" innovation to help screen more people for the virus, according to Birx.

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

A video journalist demonstrates how to take a rapid antigen test. At-home tests and the omicron variant When the omicron variant emerged in late November 2021, scientists quickly responded to ...

The discrepancies between tests and the lengths of their positive results boil down to what each test looks for and how sensitive it is. PCR tests are highly sensitive and are good at detecting ...