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Covid-19 Vaccine Spike Antibody


Roche Elecsys® Anti-SARS-CoV-2 S Test confirms the presence of antibodies after a Covid-19 vaccine

 CE marked and internally verified.

 Simple finger prick blood test.

 Results available within 2-3 days on receipt by the lab.

In stock

In stock   |   Free Delivery

About this health test

Covid-19 Vaccine Antibody Test [ Have I made antibodies to the Vaccine? ]

This Covid Spike Antibody Test After Vaccine Or Infection determines and quantifies the number of antibodies after a Covid19 vaccination & past infection.

Roche Elecsys® Anti-SARS-CoV-2 S tests the quantitative determination of antibodies against the SARS-CoV-2 in serum.

  • The spike protein is the target of many COVID-19 vaccines including the Pfizer, Moderna and Oxford AZ vaccines. This blood test enables determination of both the presence and level of antibodies to the COVID spike protein.
  • This test can signal whether a person has already been infected and has potentially developed immunity to the virus.
  • This test plays an important part in characterising a vaccine-induced immune response

This Roche assay provides a sensitivity of 99.98% and a specificity of 98.8%.

Simple finger prick capillary blood test to be taken at home and sent to our partner laboratory. CE Marked.


Who should take this test? 

If you have had a Covid-19 vaccine at least 14 days or more and want to confirm the presence of antibodies.

This test detects the presence of antibodies to SARS-CoV-2 S which is the spike protein of the deactivated virus. Antibodies are produced in the majority of patients as a result of vaccination.

The host immune system reacts to the vaccine by producing antibodies from a few days to 2 weeks and beyond.

The level of antibodies allows identification of people who have antibodies secondary to their vaccination. The length of time that these antibodies remain detectable differs from person to person.

This test may also confirm antibodies to a previous infection to Covid-19. The results do not differentiated if they have been formed by the vaccine or an infection.


What do the results show? 

The results will show either a POSITIVE or NEGATIVE result.

Unlike many other tests it will also QUANTIFY the exact number of antibodies detected. The results will be show a result between: 0 to >2,500 units/ml.


Does everyone get antibodies after the vaccine? 

  • Not everyone will develop an antibody response to COVID infection or vaccine.
  • Timing of seroconversion following vaccine ≥ 14 days.
  • Results from different manufacturers of commercial assays should not be compared
  • Results for patients who have undergone a plasma infusion or are immunocompromised should be interpreted with caution.


Test Results Example


 What is included?

Roche Elecsys® Anti-SARS-CoV-2 S Home Test Kit

 Recorded, next working day delivery of your test kit (if booked before 3.30pm Mon-Fri)

✓ 24hr Tracked Royal Mail Return

 Results 2-3 working days from receipt by the laboratory

 Patients emailed with results and analysis by a ZoomDoc GP


When to test

We recommend you take this finger prick blood test Monday to Thursday and then positing the sample back to our laboratory which is based in Central London.


Frequently Asked Questions

  • Will this test show if I have antibodies to either Covid-19 vaccine?

    Yes - this test will confirm if you have developed antibodies to either the Pfizer or AstraZeneca Covid-19 vaccines.

    It specifically looks at antibodies to the spike protein.

    This test will also confirm if you have antibodies to a previous Covid-19 infection although it does not differentiate if the antibodies found are secondary to an infection or the vaccine itself.

  • What do the results show?

    This test will provide confirmation of a Positive or Negative result.

    It will quantify the exact number of antibodies that are detected in your finger prick blood sample: between 0 to >2,500 units/ml.

  • How long after the vaccine should I take this test?

    We would recommend taking this test at any point from at least 14 days after your first vaccine.

Get in touch
We’re happy to help

If you have any queries please check our list of frequently asked questions or get in touch with one of our experts who will be happy to help.

”At ZoomDoc, we have supported thousands of patients during the Covid-19 pandemic. Our amazing Trustpilot reviews are testament to the high quality service that our team of Doctors provide.

This simple finger prick blood test will determine and confirm if you have had an antibody response to either the Pfizer or AstraZeneca Covid19 vaccine. It will also show antibodies from a previous infection to Covid-19. Unlike many other tests available – this test will also quantify the exact number of antibodies detected: between 0 to >2,500 units/ml. “

Dr Kenny Livingstone. GP & ZoomDoc Chief Medical Officer.


How to take your blood test

In stock

In stock   |   Free Delivery