Author Topic: Dropping Antibody Levels  (Read 16446 times)

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Re: Dropping Antibody Levels
« Reply #270 on: January 14, 2021, 05:31:53 PM »
I had a mild case, 1.5 months later had 7/15 aka negative for antibodies, 3.5 months after infection got a positive antibody result (different test, no number given).
very likely you were exposed and it triggered a response

Offline Ergel

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Re: Dropping Antibody Levels
« Reply #271 on: January 14, 2021, 05:35:32 PM »
very likely you were exposed and it triggered a response
Source?
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Offline Ergel

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Re: Dropping Antibody Levels
« Reply #272 on: January 14, 2021, 05:52:41 PM »

So....my daughter got the exact same results - which firstly seems odd. She tested negative twice after my wife tested positive, but I guess either they were false negatives or it's possible she had it before my wife and by the time she tested was already negative?
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Offline AsherO

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Re: Dropping Antibody Levels
« Reply #273 on: January 14, 2021, 06:35:40 PM »
What does the below mean? That antibodies were present, but not enough to cross the threshold?



I got the same and I donít believe Iíve had COVID, multiple negative PCRs every time I thought I had symptoms.

Offline Dan

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Re: Dropping Antibody Levels
« Reply #274 on: January 15, 2021, 03:50:56 PM »
Save your time, I don't answer PM. Post it in the forum and a dedicated DDF'er will get back to you as soon as possible.

Offline zagguru

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Re: Dropping Antibody Levels
« Reply #275 on: January 15, 2021, 03:55:08 PM »
No idea what my levels are, but just tested positive for antibodies some 11 months after I was infected.

Same levels?

Offline Dan

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Re: Dropping Antibody Levels
« Reply #277 on: January 18, 2021, 02:46:53 PM »

"Most persons infected with SARS-CoV-2 display an antibody response between day 10 and day 21 after infection. Detection in mild cases can take longer time (four weeks or more) and in a small number of cases antibodies (i.e., IgM, IgG) are not detected at all (at least during the studiesí time scale)."
https://www.ecdc.europa.eu/en/covid-19/latest-evidence/immune-responses
Does the same apply for getting the vaccine? will I have a quantitative antibody count 21 days after the second dose?

Offline Dan

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Re: Dropping Antibody Levels
« Reply #278 on: January 22, 2021, 03:35:14 PM »
I haven't been able to get titer levels yet.

It only recently got EUA approval: https://www.labcorp.com/coronavirus-disease-covid-19/news/roche-receives-fda-emergency-use-authorization-new-semi-quantitative-test-measure-level-sars-cov-2
Took this, 192.6 U/mL. Anything over 0.8 is considered positive.
The total range is 0.4-250 U/mL.

Curious how this compares to other people who had COVID or had the vaccine. But it's excellent news that 11 months later I'm still at the high end of the range.
« Last Edit: January 22, 2021, 03:39:53 PM by Dan »
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Offline zh cohen

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Re: Dropping Antibody Levels
« Reply #279 on: January 23, 2021, 07:32:09 PM »
But it's excellent news that 11 months later I'm still at the high end of the range.

How severe was your case? I thought they were saying that people with mild cases likely have lower antibody count.

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Re: Dropping Antibody Levels
« Reply #280 on: January 23, 2021, 07:35:20 PM »
But it's excellent news that 11 months later I'm still at the high end of the range.
I wonder if it was boosted by further exposure.
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Offline Dan

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Re: Dropping Antibody Levels
« Reply #281 on: January 23, 2021, 07:44:22 PM »
Save your time, I don't answer PM. Post it in the forum and a dedicated DDF'er will get back to you as soon as possible.

Offline Dan

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Re: Dropping Antibody Levels
« Reply #282 on: January 23, 2021, 07:46:48 PM »
I wonder if it was boosted by further exposure.
Certainly possible. No way to know, as this was my first quant titer.
My son had COVID last month, but nobody else in the family tested positive on multiple PCRs each.

Anyone else going to take the Roche quant titer (Labcorp test 164090)? Would love to see comps.
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Offline skyguy918

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Re: Dropping Antibody Levels
« Reply #283 on: January 24, 2021, 11:48:21 PM »
Took this, 192.6 U/mL. Anything over 0.8 is considered positive.
The total range is 0.4-250 U/mL.

Curious how this compares to other people who had COVID or had the vaccine. But it's excellent news that 11 months later I'm still at the high end of the range.
Anyone else going to take the Roche quant titer (Labcorp test 164090)? Would love to see comps.
NYC Health & Hospitals was using a quantitative Roche antibody test as far back as Sukkos at least, but it doesn't appear to be the same exact test. The cutoff was .99, not .81, and they didn't provide a total range.

https://www.fda.gov/media/137603/download

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Re: Dropping Antibody Levels
« Reply #284 on: January 24, 2021, 11:51:44 PM »
Took this, 192.6 U/mL. Anything over 0.8 is considered positive.
The total range is 0.4-250 U/mL.

Curious how this compares to other people who had COVID or had the vaccine. But it's excellent news that 11 months later I'm still at the high end of the range.
How much does the test cost? Does insurance cover?