Doctor performed venous blood test more accurate than home finger prick self test kit.
MHRA stops Home finger prick Antibody tests
The Medicines and Healthcare products Regulatory Agency (UK Department of Health agency that regulates medicines and medical devices to ensure they meet safety, quality and efficacy standards) have asked all laboratories in the UK to stop analysing home finger prick Covid-19 antibody tests with immediate effect until they check how well they work for this non-approved testing method.
Abbott Laboratories have insisted that its test was developed for use by laboratory professionals using a venous blood sample that is taken by a healthcare provider. It is not a home test and it should not be conducted with a finger stick blood sample.
How long could the IgG Antibody offer me protection for?
As of October 2020, we are seeing antibodies present for our patients with symptoms of Covid-19 back in March 2020. We have patients who do their antibody test every month with us to ensure their antibodies are still positive, hence we will keep you updated as to how long their antibodies are lasting.
Data from the previous Coronavirus (SARS-CoV) suggests protection up to 2 years with the IgG Antibody.
What about the Government procured Antibody tests?
The UK Government has purchased 2 high quality venous blood only laboratory Antibody tests. One is the same as our Abbott laboratory antibody test and the other is the Roche® laboratory antibody test. The NHS will be mainly prioritising our front-line key workers to obtain these tests.
How does the Abbott® test compare to Roche® and other currently available tests for Covid-19 Antibodies?
The Abbott venous blood laboratory antibody test is one of the two best quality antibody tests currently available (the other being Roche). On all current data evaluated, there is unlikely to be a statistically significant difference between the Abbott and Roche SARS-CoV-2 antibody tests.
Public Health England (that is the NHS) has approved both the Abbott and Roche venous blood Laboratory Tests as being highly accurate and given the green light for a national roll-out.
Public Health England have also done their own evaluation on both the above tests and have found the vein taken Abbott Architect antibody test to be as equally effective as the Roche Elecsys vein taken antibody test. Click here for a summary of their findings.
Abbott® CE approved venous blood IgG antibody test (for SARS-CoV-2) run on an Abbott Architect analyzer (100% Specificity 2-3 weeks after onset of Covid-19 symptoms).
Same Abbott Architect IgG venous blood Laboratory test for which other clinics are charging £165!
|Blood Test by Doctor||One-off £39 admin fee (per visit)|
– plus labaratory cost (select your blood test for prices).
– £5 surcharge on weekends
Book On-Line as ‘GP Blood Test’.
Abbott® Immunoassay Covid-19 IgG Antibody blood test [£49]
This is the PHE approved Covid-19 venous blood antibody test that we as doctors have been waiting for to provide good quality evidence of your antibody status.
- 97.5% Sensitive at detecting IgG antibodies in people who have been ill from Covid-19 at least 14 days or more after their first symptoms. Sensitivity is the ability of a test to correctly identify those with the disease (true positive rate). This is a laboratory percentage for both finger prick and venous blood tests – the venous blood test value approaches 100% Sensitivity.
- 100% Specific at detecting IgG antibodies. Specificity is the ability of the test to correctly identify those without the disease (true negative rate).
A recent study has shown up to 100% Sensitivity and Specificity when venous blood was taken at least 17 days after onset of Covid-19 symptoms.
You can ONLY come to us to have this test:
- If it has been at least 2 to 3 weeks after the onset of any Covid-19 symptoms.
- If you have no current Covid-19 symptoms (no temperature, cough, weakness, loss of taste/smell).
- You have to wear a mask at all times in the Surgery.
- You MUST bring in your photographic ID. At home finger prick tests cannot verify your result as belonging to you.
Am I Immune if I am IgG positive (hence cannot contract the virus again)?
The Scientists are not 100% certain yet. In general if you are IgG positive to any infection, you are immune and you should not contract that infection again. However, in the case of SARS-CoV-2 virus, we are still not certain if being IgG positive confers complete protection and if so for how long. What we know for certain is that having IgG antibodies to other viruses in the Coronavirus group is associated with at least a short term immunity to re-infection. Hence, even if you are IgG positive, you should continue to follow the governments guidelines on social distancing and protecting yourself and others against infection.
Please note that there have been instances where patients have definitely had covid symptoms (and even confirmed as being positive on a PCR swab test during their illness), but did not mount an IgG antibody response. Hence these patients will test negative for the IgG antibody and therefore be vulnerable to getting the Covid-19 infection again.
|Abbott SARS-CoV-2 IgG Level||Interpretation|
|< 1.4||Not detected|
|> / = 1.4||Detected|
How long does it take for me to get my blood test results?
1 – 2 working days.