COVID-19 Rapid Result
The COVID-19 Rapid Result Blood Test is an instant fingerstick test to detect COVID-19 antibodies.
- 98%+ Accuracy
- Tests for 2-antibodies Simultaneously
Rapid antigen tests are immunoassays that require respiratory specimens (typically nasopharyngeal or nasal swab) from the patient because SARS-CoV-2 is a respiratory virus. Once collected, samples are placed in an extraction buffer or reagent and tested for the presence of SARS-CoV-2-specific antigens.
Rapid antigen tests tell us if a patient is actively infected with SARS-CoV-2. They detect the presence of virus-specific proteins, called antigens, from patient specimens. As of Aug. 18, 2020, the FDA has issued Emergency Use Authorization (EUA) for 3 rapid antigen tests. All of these detect SARS-CoV-2 nucleocapsid protein (N) antigens. Results are produced quickly, generally within 15 minutes, and can be performed near the place and time of patient care (as opposed to a separate laboratory setting). If the viral antigen is detected, it indicates that the virus is present.
Diagram of a rapid antigen test. Sample is applied to the test strip and if antigen is present, it is bound by antibodies linked to detector molecules, as well as antibodies immobilized in the test line further down the strip.
These tests are generally less sensitive than molecular tests, and it’s important to be aware that there is an increased possibility of false negatives with rapid antigen testing. They are most accurate when viral loads are high (within the first couple of symptomatic days), and your healthcare provider may order a molecular test to confirm the results of your rapid antigen test if it indicates that you are negative for SARS-CoV-2. If your rapid antigen test is positive, there is no need to confirm with a molecular test, as these tests are highly specific.