Well, so as not to draw out the suspense, I'll report that we were very glad to have Elias sprung from the hospital after spending one night.
And, as far as anyone knows, he's still suffering from... a cold. Just a cold bad enough to put him in the hospital twice now. The pediatricians at the emergency department tell us they're filling their beds with similar cases.
He got out in time to make me a book for my birthday.