NYC and Stockholm antibody tests would indicate an IFR more like 1% or a little over.
Though I'd be cautious about being too confident in antibody study results, for now. A lot can depend on test accuracy (especially where covid is rare anyway).
That study (and the related Santa Clara study by a subset of the same authors) were torn apart by statisticians for the shoddy methodology and irresponsible selling of its results to the media.
https://www.sfgate.com/news/editorspicks/article/Los-Angeles...