I walked into the Infirmary, Sitting down on a nice, soft cot. I looked around for some Apollo kid but saw none. "Huh. I'm going to get back at the Hermes kids for growing poison fruit in our cabin!" I mumble to myself. Nectar of Ambrosia won't help cure the posion, Gee, those Hermes kids were smart! "Uh... I have poisoning here!" I shout into the empty room. No answer. Crap, I'm going to have to wait!
This is a well known fact about Demeter kids. They can handle poison very well, it doesn't affect them much at first but if they wait it'll get worse.