The difference between a PCR and a Rapid Antigen Test What you normally think of as a home COVID test—like the kind you can order for free from the governmen t—is a rapid antigen test.

Fact checked by Nick Blackmer Medically reviewed by Steffini Stalos, DO Using expired COVID-19 tests is not recommended. If you have old COVID tests in your medicine cabinet, it may be tempting to use ...

"People have to take a PCR test to have their case reported and many, many people with COVID aren't getting a PCR test. They are taking an at-home test or not testing at all, so the numbers are ...

New research from the U of A could lead to an inexpensive, at-home COVID-19 test that uses liquid crystals to deliver results in less than two minutes.