I really doubt they inject any and all children.
A more plausible theory is that the child simply got in line behind her friends not knowing what it was for. I did that once when I was in 1st grade
and it ended up being a line of kids who got into trouble. They were lined up to recieve a paddling and I ended up with one as well.
Stuff like that happens.
The school messed up by trying to get the lady to sign the form. They should have admitted the mistake.




