[Better than her walking around and getting worse! Rest will strengthen her body to fight back whatever’s at her heels — he just hopes it’ll be enough.

Her reply is acceptable, at least, seen in the way his shoulders relax. He nods, glad for it, then tends to her question.]

No. At least, I never have been sick; it’s hard to say what rules apply in this world, or any of the others that we visit, but a synthetic creation like myself can’t house illness.

That's how it was back in Detroit. The case seems similar here.