Vaccine Antibody Test

Measurement of Antibodies Post Vaccination

  • Provides a quantitative value of COVID -19 IgG antibodies
  • Result in 24 hours
  • 100% specificity and sensitivity after 28 days
Pricing £49
Type of sample taken Blood test
Turnaround time 24 hours
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Based on 164 reviews
Vaccines are here and we are celebrating this enormous scientific achievement with everyone else. Vaccines work by triggering an immune response in the body resulting in several measurable markers, including IgG antibodies. This test lets you know whether you have COVID-19 IgG antibodies and how many you have.

This brand new quantitative IgG antibody test for COVID is exciting because it not only lets you know whether you have IgG antibodies but also, how many. This means that post-vaccination, antibody levels can be tracked, from after one month after your first dose.

For example, COVID-19 IgG antibodies tracked in one of our 80-year-old patients who has had both of their vaccine doses and has never knowingly had COVID-19 previously showed the following:

  • Day 14 – 389 U/ml
  • Day 28 – >2500 U/ml
  • Day 42 – 1799 U/ml

We are continuing to track these levels and will update accordingly.

As you can see, tracking antibodies gives an interesting insight into the immunity response to the COVID vaccine but also, as antibodies decline over time, testing also helps give insight into levels of protection. Immunity is made up of more than just IgG antibodies however – we know that T-cell response is also important – but tracking IgG antibodies gives a good idea of the level of protection available.

During these difficult times, it’s difficult to know who to trust. Our clinic has been in operation for 23 years and is regulated by the Care Quality Commission. We have carefully vetted any laboratory we work with to ensure they are accredited appropriately and clinically sound.

Book online by selecting option A4 or call us today.

What does the test involve?

The test is a full blood draw conducted by a nurse or healthcare assistant. Your sample is sent to our laboratory and your result will be emailed to you in 24 hours.

Frequently Asked Questions

When should I test after vaccination?

To the best of our knowledge, the best time to test is 28 – 35 days after your second dose. However, the UK government roll-out of the vaccine leaves approximately three months between doses so you can also consider a test a month after your first dose. This advice is based on recent findings in the third stage of trials by AstraZeneca.  We have very limited information on testing after the first dose of the Pfizer or Moderna vaccine.

What test do you use and what does the result mean?

The Roche quantitative antibody test provides a positive and negative result, as well as a quantitative result - meaning, the number of antibodies present. The threshold for a positive result is lower than the Abbott test and the quantitation is helpful if you want to track your antibody levels. We are delighted that the Roche test has shown 100% specificity and sensitivity after 28 days. This means we can have full confidence in the results provided.

So will this test let me know if my vaccine has worked?

A successful immunity response after a vaccine is made up of several markers, of which IgG antibodies is one. Therefore this test gives a partial picture from which we extrapolate the success of the vaccine. It does not give a complete picture, however, and immunity may continue after IgG antibodies decline. Research is still being conducted to better understand this.

Can you tell me what level of antibodies is considered a successful immunisation for each vaccine?

We don't know that yet as this information has not been provided by any vaccine provider. However, the presence of antibodies confirms an immunity response. The cut-off point for the Roche antibody test to register as positive is 0.8 U/ml. Patients who have been vaccinated have registered a wide range of antibody titres from around 200 U/ml to over 2,500 U/ml.

Will you know whether the present antibodies are because of a previous infection or because of my vaccination?

We can let you know whether you have COVID-19 IgG antibodies and how many but this test does not let us know whether antibodies are due to a previous infection or the vaccine. Our laboratory is working on an additional test that will be able to make this differentiation and we will update this page as soon as that is available.

I’ve had my second dose over 28 days ago but I tested negative – how is this possible?

No vaccine is 100% effective and it is possible that you did not have an immunity response to the vaccine. You may also have tested too early - please see our recommendations of when to test above.

Testing Price List


Testing Rates Prices from
Vaccine Antibody Test £49
Measurement of antibodies post vaccination or infection via Roche Quantitative Test method
T-spot (T-cell) test £129
Testing for the presence of COVID-19-related T-cells
T-spot & Antibody Package £199
Roche Quantitative Test and T-spot (T-cell) blood test package
Standard PCR Swab Testing £99
Conducted in-clinic for travel, work or ending quarantine. Next day results by 8pm.
Test To Release £99
PCR test for government's test to release scheme. Next day results by 8pm.
Fit To Fly Certificate £99
Next day results by 8pm.
Same-day PCR Swab Testing £139
Conducted in-clinic for travel, work or ending quarantine. Results by 10 pm. Must test before 10.30 am. Suitable for test to release (day 5) and fit to fly.