The test most commonly used to diagnose COVID-19 is a molecular test, or PCR test. Although antigen tests generally have lower sensitivity compared to NAATs, they can also be used to test for infection with specific attention to the context in which they are used, described below. The authorized instructions for use for each test can also be found on the FDA's. A negative antigen test result for a symptomatic person should generally be confirmed with a laboratory-based NAAT. Saving Lives, Protecting People, Given new evidence on the B.1.617.2 (Delta) variant, CDC has updated the, The White House announced that vaccines will be required for international travelers coming into the United States, with an effective date of November 8, 2021. Health's content is for informational and educational purposes only. Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. However, some patients question their accuracy as the FDA monitors reports of false . On a basic level, yes, your COVID test can expire and there should be an expiration date stamped on the package of your home COVID test. COVID-19 antigen tests may not detect the SARS-CoV-2 virus early in an infection, meaning testing soon after you were exposed to someone with COVID-19 could lead to a false-negative. CDPH Guidance on the Use of Antigen Tests for Diagnosis of Acute COVID-19 Monitor your symptoms. The specificity isnt the problem right now, he continues. Kaitlin Sullivan is a health and science journalist based in Colorado. An infection with the SARS-CoV-2 virus may cause new or worse symptoms. Antigen tests are an important tool in the overall response against COVID-19 and benefit public health. Before you use a COVID rapid test, it's wise to first check the expiration date, and if it's past its shelf life, check the FDA website to determine if your particular rapid test's shelf life has been extended. Youre probably familiar with home COVID tests on some level by this point, but it never hurts to go over the basics.

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