Seriously???

So, the kids have been in school for about 8 weeks now. They have their first conferences on Wednesday. Anyway, yesterday I got a note in Emily's backpack that there is a confirmed case of head lice in her class. This is the THIRD TIME in 8 weeks!!! WTH???? As far as I know it is the same person each time and no one else has gotten it, but what is this kid doing that he/she keeps getting lice? Is there house that dirty? Do they play somewhere they shouldn't?? It's getting annoying...the constant checking to make sure no one has it. My head itches just thinking about it again!!! ICK!