[It sure is a struggle to deal with, but he just smiles on instead of commenting on that further. Especially since this guy is going on to theories about just why he might not be getting sick.]

That's a strange thing, isn't it? When my health is poor in the winter, after all, I become more susceptible to colds and the like, but here, I wonder if I truly am some sort of invulnerable?

[Oh no, if he has that confidence he's going to be trying to run all over.]

I feel a bit better hearing that. After all, since you all seem to be feeling ill, and it's not as much of a usual thing... then isn't it my place to help? Do you have a fever, like the others?

[Anyway, he's going to help himself to trying to touch the back of his hand to Alphinaud's forehead, behind his bangs.]