There is no way in hell my child would not tell me if they got a shot from a stranger at school. I am certain that most children on earth would tell their parents when they got home that they were stuck with the needle because it is not something they want to happen it is something they are terrified of and is very uncomfortable. As soon as one child went home in America to tell their father that the school put a needle in their arm would be the immediate burning down of said school and it would be all over the news.