Coronavirus Antibody Blood Test
    Coronavirus Antibody Blood Test
    Coronavirus Antibody Blood Test
    Coronavirus Antibody Blood Test
    Coronavirus Antibody Blood Test

Coronavirus Antibody Blood Test


Monitor your coronavirus antibody levels with our home blood test.

Results estimated in 2 working days

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  • Collect your own finger-prick blood sample at home   Free

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Is it for you?

Do you want to know if coronavirus (covid-19) antibodies are present in your blood? With our CE-marked sample collection kit, you can monitor covid-19 antibodies in your blood from the comfort of your home. This test is helpful to monitor your antibodies if you have had covid-19 or the covid-19 vaccination or if you'd like to see if you have had a previous covid-19 infection.

Please be aware it is not yet known what level of antibodies gives you immunity to coronavirus or to what extent the previous infection provides immunity from covid-19 in the future.

Biomarker table

Covid antibodies

Roche anti-SARS-CoV-2-S result

Learn more

This test looks for antibodies to the spike protein of SARS-CoV-2, the virus which causes COVID-19. These are the antibodies which the body makes to fight the virus. It measures the quantity of antibodies present, and is reported as a numeric result. The duration and effect of these antibodies in giving immunity to the virus is still being established.

Anti-SARS-CoV-2 S Qualitative

Learn more

The Anti SARS-CoV2 S Qualitative result describes whether coronavirus antibodies were detected or not in your sample. A low numeric result may mean that antibodies were not detected.
Special instructions

How to prepare for your test

Prepare for your Coronavirus Antibody Blood Test by following these instructions. Take this test at least 14 days after you developed symptoms of coronavirus, or 21 days after you were at risk of coronavirus infection.

Blood testing made easy

How it works

Your personalised, actionable health results are only a few clicks away. Order your test, take and post your sample, then view your results online with our doctors' comments.

Your results, simplified

Track, improve, and monitor your health over time

MyMedichecks is your personal online dashboard where you can view your results, access clear and simple explanations about individual health markers, monitor changes in your health, and securely store information about your medical history, lifestyle, and vital statistics.


What could my results show?

Your result will lie between 0.4 units per millilitre (U/ml) and 2,500 U/ml. A result below 0.8 U/ml means that the lab did not find antibodies in your sample. A result above 0.8 U/ml means that antibodies were detected, so you likely have had coronavirus (or have been vaccinated). It is possible to get a result below 0.8 U/ml even if you have had a coronavirus infection. This could be because you only experienced mild (or non-existent) symptoms. It could also be because your body responded to the virus using different parts of your immune system. There is a higher chance of a negative result (below 0.8 U/ml) if you take this test too soon after becoming infected with coronavirus or being vaccinated. This is because your body may not have had time to produce antibodies. We recommend waiting at least three weeks after a known infection or vaccination before taking this test. A negative antibody result cannot exclude a current infection. If you have recently been exposed to a coronavirus (such as SARS-CoV or COVID-19), the level of antibodies in your blood may not have yet reached levels that are high enough for this test to detect.

If you would like to monitor your antibody level over time, we recommend taking a test every three-four months. Several studies have shown that coronavirus antibodies remain in the blood for at least six-eight months for most people. For some, particularly people with no symptoms, antibody levels may decline more quickly.

How accurate is this test?

We use a CE marked Roche coronavirus antibody test called the Elecsys Anti-SARS-CoV-2 S assay. The manufacturer (Roche) carried out a study to support the CE mark submission of this test. The study used blood samples from patients with a positive coronavirus infection. Roche did not use samples from people without symptoms, so the results may have differed if the study had included these people.

Test sensitivity is the ability of a test to correctly detect a positive result when testing samples from people known to have had a coronavirus infection. Sensitivity can increase from the point of diagnosis because antibody levels increase in response to an infection. This means that from 21 days after a positive diagnosis (the earliest point at which we recommend testing), the test returned a positive result in 98.3% of cases. After 28 days, sensitivity is 100%, based on Roche’s study.

Test specificity is the ability of a test to correctly produce a negative result when testing samples from people known not to have had a coronavirus infection. Roche used 5,991 negative samples (which were collected before October 2019). The test produced only one false-positive result – giving the test a specificity of 99.98%.

This test may not accurately detect antibodies in people who have compromised immune systems because their antibody response may be slower or weakened. This includes people with immunodeficiency diseases, infections such as HIV, or those who take medications that suppress the immune system. This may also affect the sensitivity and specificity of the test.

What is the Coronavirus Antibody Blood Test?

Our Coronavirus Antibody Blood Test is a laboratory test that measures the level of antibodies in your blood. It is called the Roche Anti-SARS-CoV-2-S coronavirus antibody test. You can use this test to monitor your antibody levels to record your response to the virus or the vaccine. This test is only available as a home finger-prick kit because clinic and nurse services are not permitted to collect venous samples for coronavirus antibody tests unless they are covered by UKAS accreditation. As our laboratory is UKAS accredited, we can offer this test with a self-collection finger-prick kit. Your anonymised data may be used to help UK public health agencies (including Public Health England) and other organisations understand the spread of coronavirus within the UK population.

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