The study Ken linked to is NOT somebody pushing some unverified antibody test with the promise that it'll tell you if you've had the virus and are now immune so can go back to work/etc without worrying.

This is a long-term study by the National Institutes of Health attempting to finally get a handle on just how many people in the U.S. have actually been infected with coronavirus and just how rapidly the coronavirus is spreading among people who haven't been able to get tested. If anybody can get access to VALIDATE antibody tests to use, it would be scientists working under the National Institutes of Health.

Plus, I doubt they'll be looking to enroll people who just want to find out if it is now "safe" for them to quit social distancing. They're going to want a fair sampling of the whole population...which is the big reason I'm willing to volunteer. They need some people who have good reasons to believe that they have not been exposed. That's me.