A: Julius: Actually, also in the general population there is quite a difference in the proportion of older people between Italy and China. For example, the proportion of 70-79 year olds in the general population is twice as high in Italy as in China in the general population, while the proportion of confirmed cases within the same age group is ~2.4 times higher in Italy than in China. For 80+ the proportion is 4 times higher in Italy in the general population vs. ~5.75 times higher in Italy for the share of cases. The difference between general population and share of cases is thus not as drastic as you may have expected: the Italian population is indeed significantly older than the Chinese one. As to the remaining difference, I can only speculate: I've heard rumours that inter-generational mixing (grandparents, parents and children living in the same household) may play a role in explaining the high share of old patients in Italy, but I am not qualified to evaluate this claim.