If you folks are healthy with no underlying conditions I wouldn’t be to anxious over this!! Follow the guidelines wash your hands all the time when your grandson comes home from school put his clothes in the washing machine not in an open laundry basket make sure his hands are washed you folks will be fine the hysteria over this is really quite amazing!!!
One link for you—this guy is not hysterical—he walks you through the issues piece by piece...
https://www.youtube.com/channel/UCD2-QVBQi48RRQTD4Jhxu8w
So the Italians just need to wash their hands and do their laundry.
Gotcha!