Coronavirus Antibody FAQ's

How Does the Antibody Test Work?

Our Triple Antibody Test is a simple to perform, finger prick test which only needs 5ul of capillary blood and gives results in 10 minutes.

The BioSURE COVID-19 Triple Antibody Test detects IgA, IgG and IgM Antibodies specific to the SARS-CoV-2 virus ( COVID-19).

Why Test for Antibodies?

  • It is important for you to be able to differentiate between COVID-19 symptoms and those of a common Winter cold/flu symptoms. Setting the baseline now will help you make better informed decisions for your workplace.

  • When IgM and IgA antibodies are detected without the presence of IgG the person is newly infected and is still likely to be infectious.

  • An IgG only positive result means the person has previously been infected and their immune system has produced antibodies.

  • Evidence is increasingly demonstrating that those who have had COVID-19 and produce IgG antibodies are very unlikely to be able to pass on the virus.

  • Knowledge about immunity is still developing. Whilst there is evidence of COVID-19 IgG antibodies declining after 8-weeks, any future infection should be quickly recognised by the person’s immune system due to T-cell memory. The only way to detect reactivated antibodies is through regular antibody testing, although there are currently no known UK cases of reinfection.

Does a positive antibody test mean that I now have immunity to COVID-19?

We do not yet know whether the presence of antibodies to SARS-CoV-2 in the blood provides any lasting immunity to future infection or any protection at all. We expect to learn more about the extent and duration of any potential immunity over the coming months.

What does a positive result mean?

A positive result means that the laboratory found IgG antibodies to coronavirus (SARS-CoV-2) in your blood. This means that it is highly likely that you have been infected with coronavirus in the past.

If I have a positive coronavirus antibody test result, do I still need to follow the government guidelines for social distancing?

Yes, until we understand more about the virus and whether the presence of antibodies means that you can’t catch it again, it is important that you follow all the recommended guidelines.

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.

What does a borderline result mean?

Some laboratories also report borderline results. Borderline results mean that IgG antibodies were not high enough to give a positive result. This may be because you tested too soon after developing symptoms. If you get a borderline result, we suggest repeating the test 7-14 days after your first test to check if your antibody levels have increased.