I was curious of a genetic link after hearing about a family in New Jersey where four members died after one dinner party [https://www.bbc.com/news/world-us-canada-51978164]. Being relatives, though, they may have all had similar comorbidities.
Huh. Italian family. So I suppose that they might carry susceptibility genes. It's my impression that Italians are extremely diverse genetically, but I guess that there could be ~isolated subpopulations.
I wonder whether anyone's looked for that in the data from Italy.
