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This application note focuses on the ultra-sensitivity of Spear Bio’s NAB-Sure™ immunoassay and its uncommon ability to detect anti-SARS-CoV-2 neutralizing antibodies in dried blood spots (DBS), despite low protein concentrations that result from the required elution of DBS samples. Accuracy of qPCR assay results using NAB-Sure with DBS were also validated by comparison with standard techniques.
