he tested positive for SARS-CoV-2 before he died. Spike protein (S1) antigen-binding showed significant levels for immunoglobulin (Ig) G
That specific test is positive precisely because he had been vaccinated. That test is actually designed to evaluate the presence of antibodies to the spike protein generated as a result of the mRNA vaccines.
while nucleocapsid IgG/IgM was not elicited
The fact that this test was negative is very simple proof that he had NOT been infected with Covid-19. (the nucleocapsid test is precisely designed to test for antibodies to the Covid-19 virus itself, and deliberately does NOT test for antibodies to the spike protein generated by the vaccine .
depends on when he was infected. It takes a could if days too mount.an IgM response and 10-14 days to mount an IgG response
Elicited means drawn out.
Not elicited means that specific test was not drawn out, inferring not conducted. It does not confirm negative presence of “natural” COVID as compared to presence of only VAX spike proteins as you are inferring.
Yes. So?