That would certainly make sense but I’m not aware of a good antibody test against the nucleocapsid protein that doesn’t involve a blood draw. (I found a few of those offered by Labcorp and others) Apparently the testing kit is just a spit cup?
“You fill out a questionnaire online about your exposures to SARS-CoV-2,” he says. And then if you meet the criteria of a superdodger, the team sends you a testing kit. Basically you spit in a cup and mail it back to Casanova and his collaborators.