People who have not had COVID-19 in the last 90 days can also get a PCR or other molecular test to confirm their negative antigen result.If you got an antigen test at a clinic or other testing location, get another antigen test in 24 to 48 hours.For more details on repeat testing, refer to At-Home COVID-19 Antigen Tests-Take Steps to Reduce Your Risk of False Negative: FDA Safety Communication. Follow the manufacturer instructions in your self-test kit for when to take another test. If you used a self-test, the CDC and FDA recommend repeat testing after a negative antigen result whether or not you have symptoms.Multiple negative antigen tests mean you can be more sure that you are not infected with the virus that causes COVID-19. If you have a negative antigen test, you should have another test.You should take an antigen test instead of a molecular test (for example, a PCR or NAAT test) because molecular tests can continue to detect SARS-CoV-2 (the virus that causes COVID-19) even after you feel better. If you had COVID-19 in the last 90 days, you still need to get tested if you develop new symptoms.The box should tell you what kind of test you have. If you use a self-test, read all of the instructions carefully.If you leave your home to get a test, wear a mask, and keep distance from other people as much as possible. Stay home and get tested right away if you have symptoms, even if you have been vaccinated or had COVID-19 in the past.
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