Sorry that was IFR. I think that study also assumed a relatively low Ro at 2.2-2.6. Some studies I have seen have shown it as high as 5.7. There was a lot of questions about the German antibody study specificity from what I saw. The Iceland CFR of 0.4% might be the best case scenario imo. But even there, the population is homogeneous and healthy, very unlike a place like NYC or the Bible Belt where the fatality rate would undoubtedly be higher.