SHIELD FAQ - How reliable is the SHIELD saliva test?
In a recent study, the saliva test was shown to have a specificity of 98.9% and a sensitivity of 96.8%. The FDA EUA approved SHIELD saliva-based test targets 3 highly conserved regions of the viral genome for detection. High specificity offered by 3 target detection, combined with frequent testing makes the SHIELD saliva-based test extremely accurate and one of the best tests available.
The official FDA approval can be found here: https://www.fda.gov/media/146314/download