can be traced directly back to one apartment building that could've been quarantined
And before that, to the cat that someone had for lunch???
I think most folks here don't realize that most of China predominately uses "Eastern Style" "Toilets". They aren't really toilets. They are holes in the floor.
A little bit of uhm splatter and it's all over. Not to mention, dropping trou, guess what your pants lie in?