Maybe Italy is a worst case, both because it didn't quarantine early enough, and because greater population inversion. > It's now a well-established fact that older people and those with underlying health issues are more susceptible to succumbing to Covid-19. With 23 percent Italians aged 65 or above and a median age of 47.3, the Italian population is the oldest in Europe. This is chiefly responsible for the high fat…
what's the source for italy being the oldest country? As of 2018 Germany was the oldest in the EU and their crude mortality ratio is among the lowest so far. https://worldpopulationreview.com/countries/median-age/
So Italy is older in the sense of “more people who are very old”. But you are right that the mortality difference so far is not explained entirely by this gap.
It may be informative to watch how this evolves in Greece, and to a greater extent (due to more infection before a lockdown) France and Spain. Those are the next oldest countries in the EU by this measure, and all are well above 3%.
[1] https://ec.europa.eu/eurostat/documents/3217494/10166544/KS-...