"I... hadn't thought of that," Ciri admits slowly, her brows furrowing.

"I rarely get sick. Always been that way." Probably her own genetics, come to think of it. She's never really thought about it.

"Obviously, Geralt doesn't either. Jaskier is... Resilient."

She frowns. There is Viktor's case, most obviously. (Though he'd always been sick, and it wasn't something that had happened in Abraxas... Does that count?)

"No, there are definitely Summoned who've gotten sick. One of my friends was really sick, in fact-- though he was able to find a solution."