A test like that might give mixed results because vaccine free people will have spike protein antibodies. A better indicator might be the absence of antibodies for any other parts of the SARS-CoV-2 virus. Typically only vaccine free people have those, but vaccinated people who were exposed before their jab should have them too.
Testing is a good idea, but I don’t know if anything will work well. Maybe testing for isolated spike proteins. Vaccinated bodies will still produce those months after injection.
If you can look people up in those databases you would catch the vast majority of vaccinated people. There are a few who got jabbed but never registered in those databases, but probably not many.
Oh yeah true. Natural Antibodies after exposure as opposed to synthetically derived mRNA Spike protein antibodies. So maybe a serum / diagnostic test for mRNA markers and or presence of lipid nano particulates (understanding that the body is 'said to expel' these over time anywhere from several weeks to 2 years plus).
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