Posted on 09/17/2021 1:03:32 AM PDT by O6ret
I recently had a COVID19 antibody test performed by Labcorp. The result was positive for SARS-CoV-2 antibodies with a "Semi-Quant Total Ab" of 506.8 U/ml. And there's the rub...what does this mean? Is it good, bad or indifferent? The report doesn't say and my PCP says there no data available yet that would allow him to grade the result. I am hoping that someone out there in Freeper land can explain how this number (506.8) correlates to protection. Thanks in advance.
May indicate recent immunity or immunity from a similar virus years ago.
Doesn’t tell you of T-Cell immunity.
Seems to me that you’d need a second test weeks apart to see if there’s rising in the antibodies.
If you have a positive test result on a SARS-CoV-2 antibody test, it is possible that you have recently or previously had COVID-19. There is also a chance that the positive result is wrong, known as a false positive. False positive tests may occur:
• Because antibody tests may detect coronaviruses other than SARS-CoV-2, such as those that
cause the common cold.
An antibody test looks for the presence of antibodies, which are our body’s response to infections. Following vaccination, COVID-19 antibody tests will be positive. This does not mean you have had an active COVID-19 infection.
SARS-CoV-2 Semi-Quantitative Total Antibody, Spike
TEST: 164090Test number copied CPT: 86769
Updated on 08/17/2021
On May 19, 2021, the FDA issued a safety communication reiterating that “antibody testing should not be used to evaluate a person’s level of immunity or protection from COVID-19 at any time, and especially after the person received a COVID-19 vaccination.”
What if you havent had a jab and yet you get a positive result for antibodies ???
Per Quest Diagnostics
Quest Diagnostics
SARS-CoV-2 Antibody (IgG), Spike, Semi-Quantitative
Clinical Significance
SARS-CoV-2 Antibody (IgG), Spike, Semi-Quantitative - This test is intended as an aid in identifying individuals with an adaptive immune response to SARS-CoV-2 (COVID-19), indicating recent or prior infection.
The results of this semi-quantitative test should not be interpreted as an indication of degree of immunity or protection from reinfection.
Individuals who have been vaccinated with a SARS-CoV-2 spike or receptor-binding domain vaccine may be positive with this test; however, the clinical significance of a positive antibody result for individuals who have received a COVID-19 vaccine is unknown, in part because the test’s performance characteristics have not been established for that population.
It is not known how long antibodies persist following infection and if the presence of antibodies confers protective immunity.
So if we can’t trust the results of an antigen test, then we can’t trust the results of a Covid test either. False positives don’t just happen in antigen tests, obviously.
If you have the antibodies but no jab, either the test is wrong, or that cold you had a year ago was Covid-19. I was just talking to some folks that were really sick back in January 2020, and one had lost their sense of taste. They figured it was a bout of Covid. But their tests came back negative for antibodies. Not sure when the tests were done, but I’m guessing recently? But I would think the natural antibodies would still be in their bodies.
If you have not knowingly had COVID you may have had it and been asymptomatic. That is one possibility. They can test for T Cells to confirm.
I was almost completely asymptomatic. Tiny bit of fever (+1.5F) for a day and couldn’t smell coffee for a few days. Almost did not notice it. The only reason I was paying such close attention is my wife was sick and got tested and had it.
There are still too many variables to have any definite conclusion.
Other than you have antibodies within the Corona Virus spectrum.
Thus the 2020 flu season tested as Covid!
It is yet undetermined what Antibody level is correlated to immunity against developing the COVID-19 infection
A numerical value will be reported up to 2,500 U/mL. For patients testing higher then 2,500 U/mL, your results will be reported as “Greater Than 2,500 U/mL.”
https://pubmed.ncbi.nlm.nih.gov/33483360/#&gid=article-figures&pid=fig-2-uid-1 <— 5 patients tests of U/ml post infection on a time scale to get an idea why it doesn’t mean a whole hell of a lot other than you have some degree of natural immunity if it is not a false positive.
My gut feel: If you have not had the vaxes and you were not symptomatic when you had COVID, bully for you. Your body mounted a highly effective defense and you should celebrate your luck in the genetic lottery. You are part of the population where COVID is a mild cold and not life threatening pneumonia. The fact that your levels are not particularly high but substantial, at least in my estimation, intuitively means your antibodies are very effective in squashing COVID.
Oh, and if you have been vaxed it means bubkis. It means you have been vaxed. It says nothing about immunity level. It means you have an antibody for COVID19 alpha variant spike protein and nothing more. Means there are antibodies to the alpha variant spike protein but nothing for beta, gamma, delta, mu, etc. unlike the recovered who have antibodies to literally hundreds of parts of the virus and almost certainly have some level of immunity to the variants.
How very convenient of the FDA. IOW more than likely utter BS
Which is at least 85 to 90 percent of the population using the most pessimistic numbers out there? And even among those, 90 percent survived?
Not necessarily, someone who was infected with Covid-19 and has recovered a year and a half ago would likely show no detectable antibodies. That’s a good thing.
These individuals are all but certain to have decades long if not lifelong immunity to the virus. The specific answer of course is “it depends”; people are different, their immune systems are different, and genetics also plays a role. The immune system has “memory cells” or some such, called T cells and B cells, that are sort of the immune system equivalent of the inactive ready reserve. The presence of antibodies merely means a recent infection, or immunization.
40% are a cold or less. 40% are in the range of a flu. 20% are seriously sick at pneumonia levels. Of that 20%, 20% of them are severe enough to need hospitalization.
Invermectin shifts the curve left, big time, but that is not the most dramatic thing we see. See Uttar Pradesh vs. Kerala India hospitalization/deaths data.
How effective invermectin is at preventing spread is.
By using invermectin prophylacticly Uttar has .0006% of COVID tests turn out positive where the family and other contacts of a positive test are immediately given invermectin breaking transmission chains.
Invermectin shunning Kerala has almost 20% (over 19.5%).
Kerala mirrors the US. Uttar is winning the COVID fight. The rest of the world are twiddling their toes with their thumbs up their asses when the evidence is clear. That is 4 orders of magnitude difference.
(Uttar has a population aprox 2/3rds of the USA so not some tiny sample.)
Why?
Just to math it... that is 33,333 times better results preventing transmission in Uttar than in Kerala.
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