SARS-CoV-2 IgG ELISA Kit is designed for the qualitative measurement of the human SARS-CoV-2 IgG.  ELISA detects human antibodies to COVID.  So, It is not possible to correlate +/-  results from SARS-CoV-2 IgG ELISA Kit ENZ-KIT170 to pfu/ml of the virus.   Positive and Negative Controls in this kit yields plus/minus results based on the cut-off OD values (COV). 

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