COVID-19 Antibody Lab Test


A test detecting IgG antibodies that will help determine if a person was previously infected with the virus that causes COVID-19.

Key information:

  • CE marked laboratory test for IgG antibodies to the SARS-CoV-2 virus
  • Public Health England approved assay
  • Blood sample collection kit
  • Prepaid mailing of sample to testing lab
  • Analysis of 1 biomarker
  • Downloadable results link emailed to you
  • Free standard delivery of test
  • Order by 3pm for same day dispatch (Monday – Friday) excludes Bank Holidays

The guidance for the turnaround time of results from this test is 3 working days from the time your sample is received at the laboratory. This excludes weekends and bank holidays. It is an estimate only and your results may take longer during busy periods.

Please note: This test has to be posted in a Royal Mail priority postbox and NOT returned via a post office or a standard post box.

Simply select the number of tests you want, distribute to your family, friends or workforce, and make sure each person activates their own test kit online before using it by following the provided user guide.

The World Health Organisation has advised there is “no evidence that people who have recovered from Covid-19 and have antibodies are protected from a second infection”.

However, these tests can be used to show who has had the virus.

Test Methodology – finger prick blood sample

Out of stock

SKU: CMBHUKB019 Category:

What kind of test is this? Our antibody test looks for the presence of immunogloblin G (IgG) antibodies to SARS-CoV-2, the virus that causes COVID-19. When you have a virus the body produces specific antibodies, in this case specific to COVID-19. These start to be detectable around 7 days after the onset of the virus symptoms (or the onset of the virus even in the absence of symptoms for those who are asymptomatic) and increase daily. By 14 days after the onset of the virus antibody levels are reliably detectable in most people. This test helps to establish whether someone has had COVID-19 by detecting the specific antibodies to the virus.

How is the test carried out? This test is carried out by our UKAS-accredited laboratory partners using a CE-marked antibody test. The laboratory uses your blood sample and performs the test using chemiluminescent microparticle immunoassay (CMIA) technology, which was developed by a global medical devices manufacturer and health care company. It is a CE-marked test which means the design and manufacturing of the test conforms with European standards.

Why have we chosen to sell a Coronavirus antibody test? In any testing accuracy is vital and we only wanted to offer a Coronavirus antibody test if we could find one, which offered precision and accuracy for our customers. Finding such a test has taken time due to the fact that this virus is so new however in working closely with our partner laboratories we have found a test, which offers a 99.6% accuracy rating, a level far higher than other tests that have been available for a few weeks.

How do I send my blood sample? You will be sent a finger-prick blood sampling kit which includes everything you need to take your sample and send to our testing laboratory.

Is your laboratory safe and approved? All our tests are processed at labs accredited to ISO, UKAS & CQC standards. UKAS laboratory where it is analysed and resulted under sophisticated conditions which reflect the standards carried out.

I am a key worker. Do I get priority to order a test? We appreciate that a large number of people will want to take our test. We are dealing with each and every order as a priority. Please be rest assured that Check My Body Health are committed to testing at scale and want to help as many people get back to normal life as soon as possible.

How accurate is the test?
The manufacturer states that in its validation study the test detected antibodies in 100% sensitive of confirmed coronavirus cases when the sample was taken at least 14 days after symptoms first developed (88 samples). The test produced a negative result in 99.6% of samples from people who did not have the SARS-CoV-2 infection in the same study (1070 samples). The manufacturer’s validation study was conducted on venous blood samples taken from a vein in the arm. Our UKAS-accredited laboratory in the UK has conducted validation using a combination of venous and finger-prick blood samples. In the laboratory’s study, the test had a sensitivity of 98.5% (132 samples) which means that if 1,000 people who had previously been infected with coronavirus virus took the test, 15 of them would be told that they hadn’t had coronavirus when they had (a false negative result). It had a specificity of 99.5% (186 samples) which means that if 1,000 people who hadn’t had the virus took the test, 5 of them would be told they had been infected when they hadn’t (a false positive result).

What results could your report tell me? Your test results will be described as either negative, borderline or positive. A positive or borderline result does not mean that you won’t catch the virus again or carry and transmit the virus onto someone else, nor does not mean that you are immune to having another COVID-19 infection in the future.

Does a positive antibody test mean that I am now immune to COVID-19? As yet we do not know whether the presence of antibodies to SARS-CoV-2 in the blood provides lasting immunity and prevents reinfection. If it does provide immunity we do not know how long this immunity would last. In the coming weeks and months we expect to learn much more about what it means to have the presence of antibodies and if any immunity is provided the duration this may protect us.

Could I get a false positive result? Most antibody testing will result in a small percentage of false-positive results. In the validation study this number was very small, about 1 in 200 samples from individuals not infected with COVID-19 showed a false positive. A false positive may occur in testing for SARS-CoV-2 due to antibodies to other viruses in the coronavirus family potentially reacting with the components in the SARS-CoV-2 antibody tests.

Could I get a false negative result? This antibody test was 100% sensitive in its validation study, meaning that it correctly identified antibodies to SARS-CoV-2 in all samples from people with a confirmed coronavirus infection and who were tested at least 14 days after the onset of symptoms. Testing prior to 14 days may mean you get a negative result even if you have been infected, because your antibody level may not have reached a detectable level.

What does a borderline result mean? A borderline result means that IgG antibodies were not high enough to give a positive result. This means that the level of antibodies SARS-CoV-2 coronavirus found in your blood sample is too low to be defined as a clear positive result. A borderline result may mean the sample was taken too early after the infection.

If the sample was taken after 14 days we recommend you retest in 7 days, if this test was taken prior to 14 days post the onset of symptoms we recommend you retest 21 days after symptom onset. Testing after 21 days will allow for clarification of the result.

Is it the same as the at-home rapid detection antibody tests? No. In order to get the results from this test you collect a finger prick blood sample at home in a small vial. You post this sample to our UKAS-accredited laboratory for analysis. Once the laboratory receives your blood sample, your result should be available within 3 working days.

How does it work? Once you’ve ordered your test kit, we’ll send out a finger-prick blood sample collection kit in the post. You collect your sample at home and then post the sample back to our laboratory in the prepaid mailing bag. You will receive an email as soon as your results are ready, typically 3 working days from the sample being received at the laboratory.

Who should use this test? This test is appropriate for anyone who wants to understand whether they have had COVID-19; this means individuals who experienced mild or moderate symptoms, or those who were exposed to COVID-19 but did not experience symptoms at all.

When should I take the test? It is important to wait 14 days from the onset of symptoms before taking this test. This is to ensure that antibody levels are detectable. If you did not experience any symptoms but were exposed to the virus this test should be taken 21 days after the last exposure.

Who is this test not suitable for? It should be noted that the test may not accurately detect antibodies in those with a compromised immune system as their production of antibodies is weakened or slower. This may affect individuals with immunodeficiency disease such as HIV or those taking medications that suppress the immune system.

Does this test tell me that I currently have the COVID-19 virus? No, this test detects antibodies; these are produced some time after an individual becomes infected. In the majority of people antibodies reach detectable levels 14 days after the development of symptoms or, if you haven’t had symptoms, 21 days from possible exposure to the virus.

What is a PCR test? A polymerase chain reaction (PCR) test, looks for genetic (RNA) fragments of the virus itself. This type of testing looks for an active infection and is performed by ‘swabbing’ or collecting cells from the nose and throat. A positive PCR test means that you currently have the virus and are potentially infectious to others.

Why did we choose not to sell a PCR swab test? To swab correctly the device for collecting the sample must be inserted deep into the nose and back of the throat to collect cells. This can be challenging to do as a self-test and if it is performed incorrectly it means that the test result could be unreliable and there’s the possibility of missing an infection.

What is the NHS coronavirus helpline? Do not go to a GP surgery, pharmacy or hospital. Use the 111 online coronavirus service to find out what to do. Use the 111 coronavirus service.

Information: Only call 111 if you cannot get help online.

How soon are antibodies present in my blood? For most accurate results we recommend taking your blood sample 21 days post onset of symptoms. Please see a guide below to the accuracy our our test:

90% accuracy of samples collected at 10 days are positive after Covid 19 illness 97% accuracy of samples collected at 14 days are positive after Covid 19 illness 99.6% accuracy of samples collected at 21 days are positive after Covid 19 illness

How long does shipping take and time to get my results? The whole process takes between 5-10 working days due to the delays caused by the current climate.

When you place your order it will be dispatched the next working day by 1st Class Royal Mail. You can upgrade your delivery to Royal Mail Tracked 24 for £4.99 during checkout.

Standard delivery can then take between 2-4 working days to reach you.

When you receive your kit, carry out the test and send the sample back. We include a postage paid return mail bag within your kit.

Upon reaching the lab they will process it within 1-2 working days and as soon as completed we will email you directly to securely download your results.