Though he'd escaped it.
Last victim in the family is well over 48 hours clear of this blasted vomity thing.
I have antibacced or hot washed all suspected to be contaminated items and beings.
So today we decided to venture forth once again into the wider world amongst the human folk.
Then tonight he begins vomiting.
Which means a good chance he's been totally infectious today 
He is an unreasonable small vomity person, yes?