Test Detail
Overview
Interpreting Results

Content created by

Written by
Dr. Shreya Gupta
BDS, MDS - Oral and Maxillofacial Pathology
Reviewed by
Dr. Ashish Ranjan
MBBS, MD (Pharmacology)
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Covid Antibody IgG (Quantitative)

You need to provide
Blood
This test is for
Male, Female
Test Preparation
  1. No special preparation required

Overview


What is Covid Antibody IgG (Quantitative)?

Covid-19 Antibody IgG (Quantitative) helps in detecting and measuring the presence of specific IgG antibodies against COVID- 19. Your body makes antibodies when you get an infection and these antibodies help fight against it. If you have COVID-19 antibodies in your blood, it's likely you've had the infection or have been exposed to the infection before.

Covid-19 Antibody IgG (Quantitative):

  1. Measures the presence and quantifies the specific amount of antibodies of COVID-19

  2. Measures Neutralizing Antibody 

  3. Detects prior exposure to the virus 

  4. Detects vaccine response of the body    

  5. Unit of measurement: AU/ml

  6. Reportable values:

       < 50.0 AU/ml (Negative) - Indicates the absence of Anti-SARS-CoV-2 spike protein antibodies

        >=50.0 - 80,000 AU/ml (Positive) - Indicates presence of Anti-SARS-CoV-2 spike protein antibodies which indicates recent or past infection by the virus

How does Covid-19 Antibody IgG (Quantitative) compare to Covid-19 Antibody IgG (Qualitative)?

Similarities:

  1. Measures Neutralizing Antibody 

  2. Detects prior exposure to the virus    

  3. Detects vaccine response of the body 

Differences

  1. The Qualitative test measures the presence of antibodies against COVID-19 while the Quantitative test measures the presence and quantifies the specific amount of antibodies of COVID-19

  2. Unit of measurement: AU/ml for Quantitative test vs Index value for Qualitative test  

  3. Reportable values:

           Quantitative:

           < 50.0 AU/ml : Negative 

           >=50.0 - 80,000 AU/ml : Positive

          Qualitative:

          < 1.0 : Negative 

          ≥ 1.0 : Positive

Note: Covid Antibody IgG (Quantitative) test only helps in measuring antibodies and is not meant to be used for diagnosis of active Covid-19 infection.

Interpreting Covid Antibody IgG (Quantitative) results


Interpretations

< 50.0 AU/ml (Negative) - Indicates the absence of Anti-SARS-CoV-2 spike protein antibodies


>=50.0 - 80,000 AU/ml (Positive) - Indicates presence of Anti-SARS-CoV-2 spike protein antibodies which indicates recent or past infection by the virus

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