[salmon30salmon]

It could be argued that the multi-generational home is one of the cultural ingredients for such a bad outbreak in Italy. That is a lot more common in that country than in some other parts of Europe.

It is also somewhat common in immigrant groups in western Europe and the US (though somewhat out of economic necessity rather than cultural norms) and those groups are also the hardest hit in the US (apart for retirement homes).

Causality is hard to prove, but it is something worth looking at.