Antibody tests are crazy inaccurate unless there is a high number of infected.
Abbott Launches Third COVID-19 Test, a Laboratory-Based Antibody Blood Test That Will Ship in the U.S. Starting Tomorrow - Apr 15, 2020 https://abbott.mediaroom.com/2020-04-15-Abbott-Launches-Third-COVID-19-Test-a-Laboratory-Based-Antibody-Blood-Test-That-Will-Ship-in-the-U-S-Starting-Tomorrow#.Xp_nlCcHRGg.twitter
Not sure we’re talking about the same test. It’ll be awhile before an accurate one is widely available but it couldn’t come soon enough!