Well, this is interesting. I have here, and have been told of similar problems.
There is one member of the main house who flatly refuses to adhere to any of the advice given by the government, or anyone around them. They went out today to see some friends.

I believe that the area I live in is in the high risk bracket mainly because it is wealthy and International travel is common. Lots of people here go skiing in the winter to the Italain alps for example. Many more travel for work. It's an easy comute to Barcelona here which has high density population which tend to make contagion more likely purely because statically you will come into contact with more people.
I think the divide between those who are prepared to take containment seriously and can cope with it and those who aren't/can't is going to result in some domestic fallout.
I can avoid this person easily but we do share common spaces even if we aren't both present at the same time.