Dropping Antibody Levels

[yeshivabucher]

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

[Ergel]

very likely you were exposed and it triggered a response

Source?

[Ergel]

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?

[AsherO]

What does the below mean? That antibodies were present, but not enough to cross the threshold?

I got the same and I don’t believe I’ve had COVID, multiple negative PCRs every time I thought I had symptoms.

[Dan]

Quant now available:
https://www.labcorp.com/tests/164090/sars-cov-2-semi-quantitative-total-antibody

[zagguru]

No idea what my levels are, but just tested positive for antibodies some 11 months after I was infected.

Same levels?

[Dan]

Same levels?

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

[Mootkim]

"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 studies’ 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?