No idea but that's what they say: https://www.svt.se/nyheter/inrikes/11-procent-av-stockholmarna-har-antikroppar-mot-covid-19 https://www.svt.se/nyheter/inrikes

No idea but that's what they say: https://www.svt.se/nyheter/inrikes/11-procent-av-stockholmarna-har-antikroppar-mot-covid-19 https://www.svt.se/nyheter/inrikes/11-procent-av-stockholmar... Google Translate: > Karolinska University Hospital and Karolinska Institutet have collaborated to produce a new antibody test in the fight against covid-19. > - We are happy to have a test that we know is okay. It is not 100 percent sensitive, it has sensitivity of 70-80 percent. Some will test negative even though they have had it. But no one will test false positively. Those we have tested that should be negative have been, says Jan Albert. (Google Translate translates chief physician to consultant for some reason but other than that the translation seems fine)