I asked James Monico, co-founder of Testing For All – which aims to provide affordable testing to anyone who wants it – what he thought my result meant for my protection against covid-19. This left me feeling like I had a fairly low response. An article sent to me with my results explained that a positive test was any antibody level greater than 0.8 U/mL and a typical result 21 days after a second dose of the Pfizer/BioNTech vaccine was 1000 to 2000 U/mL based on a limited data set (similar information for the Oxford/AstraZeneca vaccine I had wasn't available). My antibody level came back as 15.20 units per millilitre (U/mL). It takes two to three weeks for a vaccine to take effect so I took the test three weeks after my first dose.Ī positive result of any level means you are likely to be protected from severe covid-19 My test was developed by Swiss pharmaceutical giant Roche and I bought it through a non-profit organisation called Testing For All, for £49. Unlike older antibody tests, which simply detect whether antibodies are present or not, the new tests can tell the level of antibodies in the blood. The tests identify neutralising antibodies, which block the virus from attaching to and entering cells in the body. There are three quantitative antibody tests, or “immunity trackers”, coming onto the market that are designed to tell me. So it was worrying when I received results from an immunity test that suggested I had a low level of antibodies. If mine has kicked in, I should have enough antibodies to protect me from covid-19. But not everyone experiences an immune response to a shot. If indicated, a repeat test may yield more reliable results.IN JANUARY, I gratefully received my first dose of the Oxford/AstraZeneca coronavirus vaccine. The most common reasons for equivocal results are presence of an immune response but unclear if against the infection being tested for (COVID-19 in this case) or similar infections (the common cold is a type of coronavirus). If you had symptoms consistent with COVID-19 within the past 3 weeks and tested negative, repeat testing in 1-2 weeks may yield a positive result.Įquivocal: Your test results could not be interpreted as Positive or Negative. Please note, it may take 14-21 days to produce detectable levels of IgG following infection. This means you have not been infected with COVID-19. Negative: You tested negative for COVID-19 IgG antibody. For patients testing higher then 2,500 U/mL, your results will be reported as “Greater Than 2,500 U/mL." Please note: A numerical value will be reported up to 2,500 U/mL. It is yet undetermined what Antibody level is correlated to immunity against developing the COVID-19 infection A negative result means your immune system has not generated a measurable response to the COVID-19 vaccination and that you have likely not had the COVID-19 infection. < 0.80 U/mL: This is a negative result for anti SARS CoV-2S. The test is not able to differentiate whether the antibodies produced were in response to the vaccine or to a prior infection. It may also mean your body’s immune system has generated a response to a prior COVID-19 infection. A positive result means your body’s immune system has generated a response to the COVID-19 vaccine. >/= 0.80 U/mL: This is a positive result for anti-SARS CoV-2S. Your Spike Protein Antibody results will be reported as a reference range:
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