Understanding Antibody Test Results
Your COVID-19 antibody test results will have one of four findings: Pending, Not Detected, Borderline or Detected.
Pending: The laboratory is still processing your blood sample.
Not Detected: Antibodies to SARS-CoV-2 were not detected in your blood. When antibodies are not detected the test result is considered negative. Negative results for antibodies do not rule out a SARS-CoV-2 infection, particularly in people who have been in contact with the virus. Your immune function may have been suppressed by other health issues or the antibody level is too low for this test to detect.
Borderline: Borderline results show that the test detected some antibodies to SARS-CoV-2, but the antibody level was too low to determine that you have had a past infection. Borderline results may indicate a very early infection or a prior infection with other Coronaviruses. It is recommended that the test be repeated at a later date.
Detected: Antibodies to SARS-CoV-2 were detected in your blood. These results indicate a recent or prior infection with SARS-CoV-2. Rarely, a false positive result can occur due to a prior infection with other human Coronaviruses.
Any follow-up questions should be referred to an individual’s physician. If you do not already have a physician, you can make an appointment with a doctor at National Jewish Health at 303.398.1355.
FAQs | Test Results Guide | COVID-19 IgG Test Fact
Understanding Swab Test Results
The SARS-CoV-2 assay is a real-time test that uses the polymerase chain reaction (PCR). This test detects genetic material of the COVID-19 virus using nasal swabs and washings and sputum and bronchial washings. The results of these tests are being shared with the Colorado Department of Public Health.
DETECTED result means that you currently have an active infection with the virus that causes COVID-19. If you have a “detected” result, contact your health care provider immediately. Take steps to care for yourself. Avoid spreading the virus to others. Self-isolate until you meet all three of these conditions: Your symptoms have improved. It has been 24 hours since you’ve had a fever without taking fever reducing medication. It has been at least 10 days since your symptoms first appeared. People with compromised immune systems may need to isolate longer. Follow your doctor’s advice.
NOT DETECTED result means that you likely weren’t infected with the COVID-19 virus. You can become infected in the future. It is important to follow guidelines for social distancing, face mask use and hand-washing. Your doctor may recommend repeat testing if you continue to have symptoms.
INDETERMINATE result means that the test was inconclusive. It could not tell if viral genetic material was or was not present. An indeterminate result may occur if not enough genetic material was present.
This test was developed and its diagnostic performance have been checked by National Jewish Health Laboratories. This test has been validated following CLIA regulations. This test is used for clinical purposes.