Unexpected question

I went to the clinic today because the cold that my niece/almost goddaughter shared with me has developed into something more exciting (and I'm preaching on Sunday), and in addition to the usual "you'll be fine," the doctor asked me whether I'd dewormed lately. 

Well, no, I haven't. So amongst the other goodies I brought home, there's a deworming pill. Just one will do it, I suppose. I know that worms happen here, and it's not a big deal (unless it becomes a big deal), but it's just a reality that I've not yet encountered first-hand.