See this Seattle-King County Public Health Blog Post on Antibody Testing. It is plainly written for a layperson to understand the technology and the inconclusive nature of such tests at this point.
So, what's wrong with the tests?
- There are many tests out on the market and not all are dependable
- False positives and false negatives for up to 15% in one report are common
- If you do have the antibodies for COVID-19, it might mean nothing
- We don't know if there is immunity from the presence of antibodies
- We don't know if there is immunity -- how long it lasts
- They are not a panacea for replacing COVID-19 virus testing