COVID-19 IgG IgM Antibody Test – Appointment


1 x antibody test kit for testing of IgM / IgM spike protein antibodies to COVID-19. Testing carried out by trained professionals at our testing centre.

Step One: Book Your Antibody Test Appointment Time

Important: select the “book timeslot” button below to book in a time – when you have selected your timeslot, please navigate to the bottom of the popup to enter your details and press “book”. Your timeslot has been successfully booked when a confirmation message comes up. You can then close the appointment window and proceed with your booking.

Book Timeslot

Step Two: Select Your Results Option and Complete Order

(please see our Terms & Conditions for carrying out your COVID-19 test. By proceeding with your order, you are agreeing to the T&Cs outlined here)
SKU: SST06APT Categories: , Tag:


Despite COVID-19 vaccinations having high efficacy of 70-95 percent, you may wish to know more about your individual response to the vaccine.

Sloane Street Testing is now able to test an important part of your immune response to vaccination by measuring antibodies to the COVID-19 spike protein. We use the highly accurate Roche Elecsys test.*

Older antibody tests such as the Abbott and cassette antibody tests that give an immediate answer, do not detect a response to vaccination.

Antibody Testing FAQs

Error: Embedded data could not be displayed.

Terms & Conditions


Our catchment areas are currently as follows (postcodes within our catchment area will receive collection of their samples free of charge):

W1, 2, 8, 9, 10, 11, 14

SW1, 3, 5, 6, 10

Outside the above postcodes and within the M25: £15 charge per pick up

By purchasing your test you agree for any additional charges to be levied if a courier is organised by our service on your behalf. Sloane Street Testing reserves the right to cancel and refund test bookings where delivery/collection of the testing product(s) are not possible with the traveller's given requirements.



We will share the following minimum information with the laboratory carrying out your sample:

  • Your name
  • Your date of birth

If your test returns a positive result (this applies to swab samples only and not antibody testing), we will be required by law to share the following additional information to the laboratory and Public Health England:

  • Your contact phone number
  • Your email address
  • Your self-isolation address

By using our service, you agree to the above terms & conditions. Please read our User Guide for a full explanation of the testing process, what to expect, and your rights as a user of our service.

Frequently-Asked Questions: COVID-19 Antibody Testing

Which antibody test do you use?

We use the Roche Elecsys Anti-SARS-CoV-2-S (Spike) total antibody test.

This blood test enables the determination of both the presence and level of antibodies to the SARS-CoV-2 spike protein, which is the target of many COVID-19 vaccines. It can signal whether a person has already been infected and has potentially developed immunity to the virus and plays an important part in characterising a vaccine-induced immune response.

Will the test be able to tell the difference between antibodies I have developed after an infection and those developed since my vaccination?

No, both antibodies generated through a previous infection and those produced following vaccination will generate a positive response, and this test does not distinguish between the two.

When should I have my test?

Wait at least 28 days after your first vaccination. Your response is likely to be significantly better after a second vaccination. Some people are interested in establishing the presence of an antibody response to their first vaccination, particularly considering the deferral of the second vaccine dose to 12 weeks.

What will the result mean?

The test result is quantitative, which means you will be provided with a level of antibody response. This can be useful as you can compare your response over time.

Vaccine immunity is complex, and whilst the spike antibodies measured here are an important component of the immune response, they are not the only part of it. The body also reacts with a T-Cell response which is not currently measurable.

Whilst we feel that a high response is likely to be related to better levels of immunity to currently circulating strains of COVID-19, and a low or unrecordable response may indicate the vaccination has not been as effective, exactly what different levels of antibodies mean is hard to say at this point. More data on this vital question will become available in time.

Regardless of your test result, you will need to continue to follow government guidance relating to COVID-19.

How is the test taken?

You will need to collect a sample of your own blood by pricking your finger. You will then send your sample back to us. We will provide you a kit with all the equipment and instructions you need.

How do I order the test?

Please complete the order form on this page by closing this FAQ section and continuing down the page.

How long do the results take?

Once your sample arrives at the Laboratory, we will report the results to you within 72 hours.

How quickly must I return my sample?

The sample must arrive with the laboratory within 7 days of being taken.