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Covid Antibody IgG (Quantitative)

Also referred as

COVID-19 IgG Serology

Sars -Cov- 2 IgG Antibody Test

COVID-19 Ab Detection+Measurement

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For men & women

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18 hours

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The Covid Antibody IgG (Quantitative) test is a blood test that detects the presence and measures the levels of immunoglobulin G (IgG) antibodies produced by the immune system in response to the spike protein of coronavirus (SARS-CoV-2). It helps identify individuals who are suspected to have had coronavirus disease (COVID-19) or determine if they have developed immunity to the virus through vaccination.

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Blood

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No special preparation is required.

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Understanding Covid Antibody IgG (Quantitative)

The Covid Antibody IgG (Quantitative) test helps confirm whether you have been previously infected with the coronavirus, even if you didn’t show symptoms or were not diagnosed at the time. It assesses whether you have developed antibodies after receiving a COVID-19 vaccine, indicating your level of immunity. Additionally, identifying individuals with antibodies against coronavirus, it helps understand the spread of the virus within communities and contributes to public health care strategies.

Consider getting tested if you have a history of COVID-19 symptoms, such as fever, cough, or loss of taste and smell; recent exposure to someone diagnosed with COVID-19; or post-vaccination to confirm antibody production.

The Covid Antibody IgG (Quantitative) test offers several benefits. It can guide personal health decisions, such as taking additional precautions or understanding your risk level. It can help provide a clear picture of immunity status, which is required for certain travel destinations and employment. The test offers reassurance and clarity to those uncertain about their exposure to the virus or vaccination response. It helps monitor long-term immune response, which is especially important for at-risk individuals. For those with weak immune systems or underlying medical conditions, knowing antibody levels can help doctors tailor treatment plans.

No special preparation is needed for the Covid Antibody IgG (Quantitative) test. However, this test is most effective when conducted between two to three weeks after the onset of COVID-19 symptoms or post-vaccination, allowing your body enough time to produce IgG antibodies in response to the infection.

Lab test results may vary across laboratories. Abnormal test results require an expert interpretation; therefore, never try to self-medicate at home based solely on these results, and always consult a doctor for a proper understanding of the test results. Periodic testing may be recommended to monitor changes in antibody levels over time, especially for high-risk individuals.

What does Covid Antibody IgG (Quantitative) measure?

The Covid Antibody IgG (Quantitative) test measures the levels (titers) of immunoglobulin G (IgG) antibodies in the blood which are produced by the immune system in response to COVID-19 infection. The presence of these antibodies indicates that you have been exposed to the coronavirus., either through infection or vaccination. By quantifying the amount of IgG antibodies, this test helps assess the strength and duration of your immune response. This information is important to understand your level of immunity and for making informed decisions about your health and safety.

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FAQs related to Covid Antibody IgG (Quantitative)

What is the Covid Antibody IgG (Quantitative) test?

The Covid Antibody IgG (Quantitative) test is a blood test that measures the levels of IgG antibodies specific to spike protein of the SARS-CoV-2 virus, which causes COVID-19. It helps determine whether an individual has been previously infected with the virus or has developed antibodies in response to vaccination.

How is the Covid Antibody IgG (Quantitative) test performed?

A phlebotomist (a trained professional to perform blood draws) will clean your skin using an antiseptic alcohol cotton swab or wipe and take blood samples from your vein using a needle. The blood sample will be stored safely and transported to the laboratory for analysis.

How accurate is the Covid Antibody IgG (Quantitative) test?

Generally, it is considered reliable for detecting past COVID-19 infection or immune response to the virus, but no test is 100% accurate. The accuracy of this test can vary depending on factors such as the quality of the test, the timing of the test relative to infection or vaccination, and individual variations in immune response.

What do the Covid Antibody IgG (Quantitative) test results mean?

The quantitative result indicates the concentration or amount of IgG antibodies present in the blood sample. Higher antibody levels may suggest a stronger immune response to past infection or vaccination, while lower levels may indicate that an individual has not been exposed to the virus or has not developed a significant immune response probably due to a recent infection, waning immunity or an ineffective vaccination.

What is the difference between the COVID-19 RT-PCR test and COVID-19 antibody test?

The COVID-19 RT-PCR test detects the presence of genetic material (RNA) of the coronavirus, indicating an active infection. In contrast, the COVID-19 antibody test detects the antibodies (specific proteins) produced by the immune system in response to the virus, indicating past exposure or vaccination.

Can the Covid Antibody IgG (Quantitative) test be done at home?

Yes, Tata 1 mg labs offer safe and hygienic sample collection from the comfort of your home.

Content created by

Dr. Swati Gupta (Anand)

MBBS, MD Lab Medicine

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Last Updated

12th Oct 2025