I read that even if warmth halts it, it may rise again in winter as happened with another virus.
I'm staggered that no actual videos of hand washing, germs in ultra violet arnt on TV.
Basics.... Keep bodily fluids to yourself.
Don't share water, drinks. Don't share cutlery. Don't stick fingers into mouth when eating!
I've always been an absolute stickler for this with my own dc and yet dp of dc school friends have literally ignored all that but been mad keen on shoes off. 
In laws the same. Obsessed with shoes off, crumbs etc but happily feed my dc off their forks when ill.
Another parent again mad about tiny stain on the things, mad about shoes off and dirt on sofas. Her dd came round and actually used her bare hands to grab and eat rice!!
then licked her hands all over.
Absolutely NO cultural difference at play here at all.