Serial testing is when a single person is tested for COVID-19 more than once. Because antigen tests are less sensitive than other COVID-19 tests and false results may occur, repeated testing may identify more individuals with COVID-19 infection than a single test. By repeating testing, it may be possible to identify cases of COVID-19 infection and [...]
The test can be used by individuals with or without symptoms. If you have experienced COVID-19 symptoms in the past 5 days, you only need to test 1 time. If you have no symptoms, test 2 times over 3 days (with at least 24 hours and no more than 48 hours between tests). This is called [...]
If no control line shows up on the test, the result is invalid (even if any test line shows up). An invalid result means the test was not able to tell if you have COVID-19 or not. If the test is invalid, a new swab should be used to collect a new nasal specimen and the [...]
A negative test result means that proteins from the virus that causes COVID-19 were not found in your sample. Read the Serial Testing Information section below if you test negative and are not experiencing COVID-19 like symptoms. Negative results do not rule out SARS-CoV-2 infection. It is possible for this test to give a negative result [...]
The test is positive if a control line (“C”) and test line (“T”) both show in the marked areas on the test. This means that COVID-19 antigen was detected. A positive test result means that proteins from the virus that causes COVID-19 were found in your sample. It is very likely you have COVID-19 and it [...]
The test is positive if a control line and a test line both show on the cassette. Be sure to look closely – even a faint line indicates a positive result. The test is negative when only the control line appears. The test is invalid if no control line appears, whether or not there’s a test [...]
Potential risks include possible discomfort during sample collection and/or possible incorrect tests results (refer to the “Understanding Your Test Results” section of the instructions). Potential benefits include helping your healthcare provider to make informed recommendations about your care and helping limit the spread of COVID-19 within your family and community.
No, the nasal swab is not sharp, and it should not hurt. Sometimes the swab can feel slightly uncomfortable. If you feel pain, please stop the test and seek advice from a healthcare provider.