How reliable are covidSHIELD test results?
In a recent study, the saliva test was shown to have a specificity of 98.9% and a sensitivity of 95.8%. The FDA-authorized covidSHIELD test targets three highly conserved regions of the viral genome for detection. High specificity offered by three-target detection, combined with frequent testing makes the SHIELD saliva-based test extremely accurate and one of the best tests available.
Sensitivity and specificity are measures of a test's ability to correctly classify a person as having a disease or not having a disease.
- Sensitivity refers to a test's ability to designate an individual with
disease as positive. A highly sensitive test means that there are few
false negative results, and thus fewer cases of disease are missed.
specificity of a test is its ability to designate an individual who does
not have a disease as negative. A highly specific test means that there
are few false positive results.
I tested positive with covidSHIELD and negative with nasal PCR or other test. Which result is correct?
Not all PCR tests are the same. They run on different PCR instruments, use different reagents, look for different genes, etc. etc. For example, the covidSHIELD saliva test is more reliable overall compared to self-collected nasal specimens. Nasal PCR ...
I don't have any symptoms. Is this a false positive?
It is extremely unlikely for the covidSHIELD test to produce a false positive result. In a recent study, the saliva test was shown to have a specificity of 98.9% and a sensitivity of 95.8% which makes it one of the most accurate tests in the world. ...
Could something I ate have caused a false positive?
No. SHIELD Illinois encourages everyone to refrain from eating or drinking for 60 minutes before the test to prevent the specimen from being rejected by the lab or producing a result of INVALID. Eating or drinking before the test would not cause an ...
What is covidSHIELD’s false positive rate? I heard the test is no more accurate than a coin flip, or 50/50. Is that true?
The answer to that is, unequivocally, "no." And it is wrong by a long shot. Let me explain: In a perfect world, we would know the exact number of infected people, which would be the starting point in making such a calculation. Without knowing that ...
What do my results mean?
The covidSHIELD test looks for three markers which are specific to the SARS-CoV-2 virus plus a control substance which is added during the testing process. The results of the test can be interpreted as follows: Negative – The test did not find any of ...