Coronavirus Antibody Nurse Visit Venous Blood Collection Test
An IgG antibody laboratory blood test to help you find out if you have had COVID-19 in the past. To take this test you will be visited at home by a nurse who will take a venous blood sample from a vein in your arm. This nurse visit is included in the price of the test. Once you have received and activated your kit you will be contacted by our nurse provider within two working days to arrange a convenient time to come round and take your sample.
This test is not for sale to, or to be used by, anyone under the age of 18.
- Venous blood sample
- 1 biomarker tested
- 3 working days' turnaround – from receipt at lab
How does a nurse visit work?
1. Activate and request
Activate your kit online.
Request a nurse visit.
2. Collect and post
Give your kit to your visiting nurse.
Post your sample to the laboratory.
3. Get results
Get your results online at my.medichecks.com
IS IT FOR YOU?
Have you experienced symptoms which you think were caused by COVID-19 but would like to make sure?
Have you had a positive PCR test for COVID-19 and would like to know whether you have developed antibodies?
Or do you wonder whether you have been exposed to the virus even though you haven’t had symptoms?
Take this test at least 14 days after you developed symptoms, or 21 days after you were at risk of coronavirus infection.
This test looks for immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies to SARS-CoV-2, the virus that causes COVID-19. Your body produces antibodies as part of its immune response to an infection. These antibodies normally become measurable from 7 – 14 days post-infection and can indicate whether you were previously infected with the virus.
A positive result means that you have detectable levels of IgM and/or IgG antibodies in your blood. We do not yet know whether this means that you are immune to coronavirus or, if you are immune, how long that immunity will last.
Do not take this test if you are currently experiencing symptoms of COVID-19. Please contact 111 for guidance on what to do and to discuss testing options for a current infection.
NHS staff who are eligible can obtain a discount on this test through Blue Light Card.
The Chief Medical Officer in Scotland has advised against on-demand antibody testing. For the time being we are unable to offer nurse home visits in Scotland.
Medichecks uses the Roche coronavirus antibody test which has been both CE marked and approved by Public Health England (PHE). Roche states in its validation study that the test detected antibodies in 100% of confirmed coronavirus cases when the sample was taken at least 14 days after symptoms first developed. The test produced a negative result in 99.81% of samples from people who did not have the SARS-CoV-2 infection in the same study. The test checks for the presence of IgM and IgG antibodies, and will tell you whether antibodies have been detected but not which type of antibody.
This test may not accurately detect antibodies in people who have compromised immune systems because their antibody response may be slower or weakened. This may affect the reported results above. These people may have immunodeficiency diseases, infections such as HIV, or be taking medications that suppress the immune system.
A negative result does not exclude a current infection particularly in those who have recently been exposed to SARS-CoV-2, or in those who currently have symptoms of COVID-19, because antibodies to the virus may not have reached detectable levels at this point.
PHE test evaluation
PHE has conducted its own evaluation of the test and found that the test detected antibodies in 86.1% of confirmed coronavirus cases when tested 14 days after the onset of illness, and produced a negative result in 100% of samples from people who did not have the infection.
PHE also looked at the positive and negative predictive values for the test. The positive predictive value tells you how likely a positive result is to be true if used on the general population (i.e. you don’t know whether they have the infection or not). It is dependent on the prevalence of the infection in the population which PHE have assumed to be 10%. The negative value does the same but for people with a negative result.
The PPV for the test is 100% meaning that if we took 1,000 people from the general population who had taken the test at least 14 days after symptoms and received a positive result they would all be genuine.
The NPV for the test is 98.5%, meaning that if we took 1000 people from the general population who had taken the test and received a negative result 985 of these would be genuine, and 15 would be false negatives.
Can I get a negative antibody result even if I have had covid-19 infection?
There is a small possibility that you have had coronavirus yet have not developed antibodies. This can happen if you had a very mild case of COVID-19 or did not develop any symptoms. There is also some emerging evidence that a minority of people who had a negative antibody result may have had a different type of immune response controlled by T cells, a type of white blood cell that recognises infected cells. Our test measures IgG (immunoglobulin G antibodies) which is the most common type of antibody found in the blood after an infection. As our immune systems are highly complex and this virus is novel, it takes time for the global medical science community to develop the best understanding of COVID-19 immunity. More recently research from the Karolinska Institutet in Sweden found that people with mild or no symptoms had developed “T-cell” immunity despite testing negative for antibodies. This study is yet to be published and peer reviewed by the science community, but it has no doubt provoked further debate about how our immune systems respond to the virus. Before we can jump to any solid conclusions, further evaluation of this is needed with more research. Until we know more about whether antibodies or T-cells confer any protection against coronavirus, it is not safe to assume that you have acquired immunity to COVID-19.
Is my negative test result reliable if my suspected infection was over 2 months ago?
If you develop an antibody response to the virus, it is most likely to show up as a positive result 2-3 weeks after the onset of symptoms. Further research is currently being conducted to confirm what happens to these antibody levels beyond 5 weeks. At present we are not in a position to reach any clear conclusions as whilst some studies have shown the antibody response can disappear after 2-3 months, others have concluded this can last for longer than 2 months. In short, a negative antibody result cannot completely rule out a previous infection.
Since the first case of COVID-19 was first reported to the World Health Organisation in December 2019 knowledge about this virus has been ever evolving. Research is ongoing and there is still much more to learn about the long-term effects of this virus on our health and immunity. It is also important to note that amidst our focus on this pandemic we must not forget that the symptoms of coronavirus can be caused by other viruses, allergies and medical conditions. If you are still experiencing symptoms which cause you concern, we recommend you discuss them with your GP.
Your anonymised data may be used to help UK agencies (including Public Health England) and other organisations understand the prevalence of coronavirus within the UK population.
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.
We’re a medically-led company with a team of qualified doctors and pathology experts. Our Coronavirus Antibody Blood Test is manufactured by a leading global laboratory test manufacturer and your sample will be analysed at a UKAS-accredited laboratory in the UK.
Your personal health centre
View your Coronavirus Antibody Blood Test results on our secure online portal at my.medichecks.com. Your results will display either as positive or negative, and will come with interpretation from a doctor and guidance on what to do next.