could be she was the super spreader but got it from someone from italy. dont know how fast you go from virus entering your mouth to shedding all over backpacks
no idea length of conference
From what we have seen from videos from China (spaying down inside offices, outside on the street, spraying just everywhere), I think this virus is spread just by touching an affected person’s body part, or by that person touching something and giving that thing to you.
But of course there is no hard data on this, because China wants to keep all of this secret.