A test result that is less than 1.00 (Negative) means that antibodies were not detected in the blood sample by the test. This could mean that the individual has not been previously infected with SARS-CoV-2. The clinical significance of a negative antibody result for individuals that have received a COVID-19 vaccine is unknown. The performance of the test has not been established in COVID-19 vaccinees...
You can save your money if you want to donate blood. Unless they stopped doing it, blood donation centers will test you for CoVID antibodies and it’s free. HyVee pharmacies (and others I’m sure) charge $25 for the test.
I had CoVID at the end of December, and my husband had it the first week of January. We tested positive for antibodies in April or early May. Strange thing, my husband tested positive for both kinds.
The original Quest Covid antibody test did not detect vaccine immunity, so they went to two more specific antibody tests.
The test you had is either the 1st generation test or the newer anti Viral Capsid IgG test: indicates that you do not have natural immunity from infection.
This test would not detect immunity from vaccine: that would be the anti-Spike IgG test.
Interestingly, in early 2020, I had been seeing illnesses that seemed to be covid (by clinical signs and symptoms), but turned out not to be.
Sometimes Mother Nature throws curve balls!
Donate Blood to the Red Cross and they will do the test for free and let you know by email.