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Covid variant 'Arcturus' is spreading: What to know about XBB.1.16 A woman picks up COVID-19 rapid antigen test kits at the Watha T. Daniel-Shaw Neighborhood Library in Washington, D.C., in late December. adapt rapid antigen tests to be more sensitive to the new variants. 2023 American Medical Association. That means patients who are. 2023 Dotdash Media, Inc. All rights reserved, Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Before omicron, at-home tests with emergency use authorization (EUA) from the FDA were considered about 70% to 80% accurate not quite as good as the molecular tests, also known as PCR (polymerase chain reaction) tests, that you would typically get at a hospital, clinic or pharmacy. eMethods. Are PCR tests the only results we can trust right now? You can also contribute via. Here, Hayden offers some guidance to help you determine which COVID-19 test to use in various situations. It identifies the virus by looking for specific genetic codes, or RNA, that is unique to COVID-19. MORE: 5 things to know about omicron variant of COVID-19, "We have a site in Martin County where those tests are coming to us. ", Also, test serially. COVID-19 Convalescent Plasma: What Is Its Role in Therapy? The accuracy varies with when the tests are taken, she added. Omicron makes testing even trickier. The US Food and Drug Administration (FDA) subsequently included the idea in one of its Omicron . New research suggests that some rapid antigen tests are not sensitive enough to detect asymptomatic COVID-19 infections. The Food and Drug Administration (FDA) recently released a list of COVID PCR tests that may not accurately detect the Omicron variant, presenting people with a false negative result. The better performance of RATs in symptomatic individuals is believed to be due to the difference in cycle threshold values, which have been shown to correlate to RAT sensitivity in lab and clinical studies.