And, by the way, the rapid antigen test he took when he got ... A PCR, also known as a NAAT or molecular test, measures RNA ...

You may also hear this type of test called an NAAT test, short for nucleic ... for viral proteins called antigens. Antigen tests also may be called rapid COVID-19 tests or at-home COVID-19 tests.

WSJ’s Joanna Stern (and her mannequin clone) tried out the Detect Covid-19 Test and Cue Health Monitoring System to see how they compare with rapid antigen tests. Photo illustration: Ryan Trefes ...

At-home, rapid NAAT test options: There are several online vendors that ... Be sure to purchase a test described as a molecular test and not an antigen test. Option #2 - Laboratory based testing ...