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A 46-year-old female asked:

I had a sars-cov-2 semi-quant igg ab test done with labcorp, the reference range is neg less than 13.0 and my results are 48.6 au/ml units. what does this mean? i know i tested positive for antibodies but is that a good number for protection?

2 doctor answers • 3 doctors weighed in
Dr. Amrita Dosanjh
Dr. Amrita Dosanjhanswered
Pediatric Allergy and Asthma 38 years experience
Antibody levels do not always correlate with protection level. The test indicates that you have produced antibodies against SARS CoV2. A booster is recommended. A flu vaccination is indicated.
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Reviewed Dec 12, 2021
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Dr. Frank Kuitems
Dr. Frank Kuitems agrees1 doctor agrees
Dr. Gurmukh Singh
Dr. Gurmukh Singhanswered
Pathology 51 years experience
If you did not get Covid vaccination , get it, if you did, get a booster dose. The test done does not measure neutralizing antibodies and is not good at predicting protection. Get Flu vaccine as well.
Created for people with ongoing healthcare needs but benefits everyone.
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Answered Dec 12, 2021
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Related questions

A 37-year-old female asked:
Hello. I had blood work up done. One of the test were for covid antibodies. Sars cov 2 igg and sars cov 2 igm. I tested positive for the sars cov 2 igm test . Negative on the igg. Does that mean I was covid positive when I had the blood work ?
1 doctor answer • 1 doctor weighed in
A 61-year-old male asked:
Good evening doctors. I had the SARS COV 2 AB ((IGG) SPIKE, SEMI QN. The value was 1.43. I understand that this means that I have antibodies. What does the value/number 1.43 mean? Is that a good, ok, not good number?
1 doctor answer • 1 doctor weighed in
A 53-year-old female asked:
I had LabCorp's Covid antibody test (shown as SARS-CoV-2 Spike Ab Dilution on the report). The result was 22,003 U/ml. Is that result considered high? What does this mean?
1 doctor answer • 1 doctor weighed in
A 58-year-old female asked:
I had LabCorp's Covid antibody test (shown as SARS-CoV-2 Spike Ab Dilution on the report). The result was 12,895 U/ml. No one I know has had a result over 1000. What does this mean? Are there different tests or methods of reporting results?
1 doctor answer • 3 doctors weighed in
A 39-year-old female asked:
Immunocompromised- fully vaccinated and boosted I had a blood test SARS CoV-2 (COVID-19) antibody test. The results read POSITIVE >2500.0 u/ml. I was told that meant Ive build an immune response to Covid. Whats the chances of a false positive?
1 doctor answer • 1 doctor weighed in
Last updated Dec 12, 2021

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Vaccinations›COVID-19

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