Test results came back, and I have antibodies! Specifically, this is the SARS COV 2 AB (IFF) SPIKE, SEMI QN test from Quest Diagnostics.

My nephrologist already told me that the number is not indicative of the level of protection, and all the material from Quest says the same thing. However, I still take it as good news that I have some protection against COVID. I still need to take all preventative measures like before, such as wearing masks indoors and social distancing. Good to know that at least one of the four Moderna shots had some effect.