Here is more info on antibody tests. It’s not very encouraging.
https://www.cdc.gov/coronavirus/2019-ncov/testing/serology-overview.html
Most of the points there seem to start with ‘you MAY’.
I’m not worried. I’m old and somewhat ‘at risk’, as they tell us.
I take precautions, but I figure eventually everyone is going to get it - whatever IT is.
No good sense in worrying.