The sample is collected by Nasal Swab.
RT-PCR tests detect viral RNA while RAPID antigen tests, detect specific proteins on the surface of the coronavirus. Antigen test results may come back in as little as 15 to 45 minutes; you may wait several days or longer for PCR test results.
Antigen tests are commonly used in the diagnosis of respiratory pathogens, including influenza viruses and respiratory syncytial virus. The U.S. Food and Drug Administration (FDA) has granted emergency use authorization (EUA) for antigen tests that can identify SARS-CoV-2.
Positive results are highly accurate. Negative results may occur and may require a follow-up RT-PCR molecular test.