[There hasn't been that much change in Sebastian's expression until now, and to see - and hear - that of everything they've talked about, the simple idea of getting ill is what's thrown him... Well, it brings home a little just how different they are - how different everyone here is.]

Trust me, you don't want it. I know people who've spent more of their lives sick in bed than up and doing anything. We deal with it - I mean, we're improving these all the time... [She taps at her mask.] But hopefully one day we can do something about it.