Covid-19 Vaccine Immunity Test

Find out if you have made antibodies following a COVID-19 Vaccination.

Covid-19 Vaccine Immunity Test


About this test

This test looks for COVID-19 spike protein antibodies in a blood sample. All currently available vaccines use the spike protein to produce an immune response. A positive antibody result indicates that you have produced antibodies in response to the vaccine.

What does a negative result mean?

A negative result means that antibodies were not detected. This can indicate that you have not had a COVID-19 infection in the past or that antibodies have decreased to a level that can no longer be detected.

Can my test be positive because I have had a COVID-19 vaccine?

Yes, the COVID-19 vaccine immunity test measures SARS-CoV-2 S antibodies (spike protein antibodies). These antibodies can be made in response to any of the vaccines currently in use. A positive result can also occur from previous exposure to the virus that causes COVID-19.

If you have had a vaccine and would like to check if you have previously had the COVID-19 virus, you might want to get our combined COVID-19 Antibody and Vaccine Immunity Test. This test bundle can also tell you if you have previously had the COVID-19 virus.

Does a positive antibody test mean I am immune to COVID-19?

A positive test result indicates that you have had an immune response to vaccination or the virus. Unfortunately, a positive result does not mean that you are immune to the virus. It cannot tell you whether or not you can become ill with COVID-19 again. Nor can it tell you whether or not you can spread the virus to others. You should continue to follow all government guidance and restrictions.

Does this test tell me whether I have COVID-19 now?

No, this test does not tell you if you have a current COVID-19 infection. This test can only tell you if you have had COVID-19 in the past or an immune response to a COVID-19 vaccine.

If you have symptoms of COVID-19 that started less than eight days ago, then a PCR test can tell you if you have COVID-19.

How accurate is the test?

We use the Roche Anti-SARS-CoV-2 S test

Studies by the manufacturer have found that this test has a 98.8% sensitivity and a 99.98% specificity.

This means that:

  • The test might miss someone who has previously had the virus in approximately 1 out of 100 people (a false negative result).
  • The test might incorrectly be positive in 1 in 5000 people who have not had a vaccine or the COVID-19 virus (a false positive result).

We have performed our own verification to ensure that the test is fit-for-purpose and works with our home testing kits.

How does the COVID-19 vaccine immunity test work?

The test measures a sample of your blood to look for antibodies to SARS-CoV-2 spike protein (including IgG antibodies). The spike protein is produced by the virus that causes COVID-19. The spike protein is also used by all currently available vaccines to generate an immune response. The body responds to the virus or vaccine by making antibodies. These antibodies are used by your immune system to help fight infection. It can take up to 2 weeks for antibodies to be seen in the blood.


How it works

Order a test online

Order a test online

All tests are confidential, and designed simply to help you self diagnose.

Home testing

Home testing

All tests are designed to be able to be carried out in the comfort of your own home, simply follow the package instructions.

Post it back to us

Post it back to us

For the best results all tests should be returned in the pre-paid package provided as soon as they are carried out.

See results online

See results online

We will contact you by your chosen method to let you know your results are ready (typically 24-48 hours). You will then be able to log into your personal dashboard and view your results.

Collecting your blood sample

Your personal Dashboard

Your personal Dashboard

Designed by clinicians to enable you to clearly and safely interpret your results with different charts and views to help you monitor and aid self-improvement.