Toes? Uryuu blinked, the language queerness leaving him lost as to where that had come from and thus inclined to attribute it to Vantas-kun's alien culture. Perhaps mosquito meant something else, or sounded like something else. More to the point, that which he had kept from becoming even a niggling suspicion was confirmed. They'd given him an injection.

"Maybe," he said, noncommittal, at the assertion that it might be poisonous. "There are plenty of more interesting ways to kill us, I'd wager they think, so probably not. One thing we do know for sure: it's not actually meant to help against their manufactured illness. That was almost definitely an excuse to stick something else in you."

Matter-of-fact, however grim the tidings.

"It's not bad," he then said, taking another bite and chewing. Chewing, chewing. It might even be better than he thought, given his current condition. Speaking of. "I don't suppose she mentioned if nausea was a side effect?"

With whatever else it would do to Vantas-kun, he didn't need to also be retching while trying to navigate the institution.