In capital region of Denmark, 2.7% of Blood donors test positive for COVID-19 antibody. I& #39;m told this test is 100% specific, but I have not confirmed this with a link. https://www.dr.dk/nyheder/indland/blodbanker-tester-om-donorer-har-haft-coronavirus">https://www.dr.dk/nyheder/i...
@ElonBachman I think you were looking for this article.