Why Zithromax and amoxycillin are welcome guests in our home this week

Upon picking up the boy at school today:

A: So who did you play with at school today?
X: I didn't play with anybody.
A: Really? I thought I just saw you playing with Shaya-
X (adamantly): No, I wasn't playing with him.
A: Why didn't you play with anybody today?
X: Because I have germs.
A (slightly worried, "is he being ostracized?"): Really? Who said that.
X: I did.
A: You did.
X: Yes. I have a hundred and fifty-seven germs.
A ("oh"): Really.
X: I have a hundred and seventy germs.
A: I see.