Serial (repeat) 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 [...]

The test can be used by individuals with or without symptoms. Determining a negative result requires multiple tests. You may need to purchase additional tests to perform serial (repeat) testing. See instructions for use for complete details.

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 [...]

To increase the chance that the negative result for COVID-19 is accurate, you should: Test again in 48 hours if you have symptoms on the first day of testing. Test 2 more times at least 48 hours apart if you do not have symptoms on the first day of testing. A negative test result indicates that [...]

You do not need to perform repeat testing if you have a positive result at any time. A positive result means that it is very likely you have COVID-19 because proteins from the virus that causes COVID-19 were found in your sample. You should self-isolate from others and contact a healthcare provider for medical advice about [...]

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.

Your results will be ready in 20 minutes. Do not read results before 20 minutes or after 25 minutes.

No, this test requires no additional instrumentation and results can be read visually. You will need a timer or stopwatch to time the test.