Diamond princess skewed heavily towards an older age population, as did some of the hardest hit cities in Italy like Lombardi etc. To counter your point, there

Diamond princess skewed heavily towards an older age population, as did some of the hardest hit cities in Italy like Lombardi etc. To counter your point, there isn't any evidence to infer an IFR or 0.5-1% either. We simply don't know given the lack of antibodies testing in a randomized population set that's adequately representative of the right demographics in a given location (say NYC).