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.

Genetic, antigen, antibody? There's been a lot of talk about testing for the coronavirus, but you may not entirely understand what the different tests are for. We break them down here.

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

A previous version of QuidelOrtho's rapid antigen coronavirus diagnostic was the first to receive the FDA's emergency use authorization in May 2020.

Previously, the test was authorized for emergency use in 2021. The Flowflex COVID-19 Antigen Home Test is a nasal swab test for at-home use by symptomatic individuals within 6 days of symptom onset.

This week, the FDA granted its first full, bona fide clearance to an over-the-counter home antigen test for COVID-19, and its first to carry an official 510 (k) for use in children under age 18.

False positives are thought to be much less common. Soni said that false positive COVID-19 antigen test results have not been previously described before as a potential systematic issue.

If you’re experiencing COVID-19 symptoms, experts have guidance on when you should test for the virus and how often you should test.

With so many At-home Covid rapid testing options on the market, figuring out which COVID test is right for you can be hard, here's what our experts and researchers had to say.

To determine whether your COVID test is still usable, you can check the at-home COVID-19 tests listed on the FDA's website to see which brands have had their shelf lives extended.

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