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- Q & A
WHAT DOES AN INVALID TEST RESULT MEAN?
If the control line (C) is not visible on the test strip, the test is invalid, even if the test line is visible. An invalid test result means that the test is unable to determine if you are infected with SARS-CoV-2 (COVID-19) or not. The test needs to be repeated with a new kit and sample.
WHAT DOES A NEGATIVE RESULT MEAN?
A negative test result means that the virus that causes COVID-19 virus was not detected in the sample. A negative result is presumptive because despite a negative result you may still have SARS-CoV-2 infection. This is because the amount of virus in your sample may be too low for the test to detect it, which is called a ‘false negative result’. False negative results can occur if you read your test result before the 10 minutes have passed or when your sample has only a low amount of virus in it. Low amount of virus can occur if you take your sample at a time when your symptoms just started appearing, or when you already started to feel better at the end of your infection. There is a higher chance of false negative results with antigen tests compared to laboratory-based molecular tests. If you tested negative and continue to experience COVID-19 symptoms, you should therefore seek follow-up care with your healthcare provider who will determine the best course of action. Your healthcare provider can also determine if confirmation of your test result with a molecular assay is necessary.
WHAT DOES A POSITIVE RESULT MEAN?
A positive test result means that SARS-CoV-2 virus was detected by this test were also detected in your sample. It is very likely that you have COVID-19 and are contagious. You should self-isolate following local guidelines. Please contact your physician or healthcare provider to discuss your tests results and follow-up care. In rare instances, individuals may also have co-infections with other bacteria or viruses that this test is not designed to detect. This means that the virus detected by this test may not be the definitive or the only cause of your disease. There is a very small chance that this test can give you a positive result that is incorrect (a false positive). You do not need to perform repeat testing if you have a positive result at any time.
What is serial testing?
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 individuals with COVID-19 more reliably than a single test. By repeating testing, it may be possible to more quickly identify cases of COVID-19 and reduce spread of infection. Additional testing with molecular COVID-19 test may be necessary, depending on your individual risk factors and test results. You may need to purchase additional tests to perform this serial (repeat) testing.
WHAT IF I AM UNCERTAIN HOW TO INTERPRET MY RESULTS?
If uncertain how to proceed, contact Technical Assistance at +1 (888) 444-3657 (9:30 a.m. to 5:00 p.m. CDT M-F) or wondfo@wondfousa.com.
DO I HAVE TO REPORT MY RESULTS? (OPTIONAL)
Report your test result(s) at MakeMyTestCount.org – this voluntary and anonymous reporting helps public health teams understand COVID-19 spread in your area and across the country and informs public health decisions.
What is the difference between an antigen and molecular test?
The Wondfo 2019-nCoV Antigen Test is an antigen test which detects proteins from the virus. Molecular tests detect genetic material from the virus. Antigen tests are very specific for the virus, but not as sensitive as molecular tests. This means that a positive result is highly accurate, but a negative result does not rule out infection. If your test result is negative, you should discuss with your healthcare provider on whether an additional test is necessary and if you should continue isolating at home.
HOW ACCURATE IS THIS TEST?
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