[It's difficult to say, not knowing the illness in question, but... it is indeed odd.] Physiology is interesting, is it not? To be susceptible to something common but be completely immune to something more deadly with seemingly little rhyme or reason. [Other than... luck or so it might appear. That would sound terrible to say out loud considering his circumstance with his chronic illness.

But he's no expert on this at all, really. As part of his studies in curative magic he of course also studied a lot of anatomy and physiology both.... but the context was quite different when using that knowledge for healing magic versus anything else.

He's caught up in his thoughts so Eichi is plenty free to succeed in touching his forehead since Alphinaud fails to notice until he feels it. He jerks his head up in surprise and then is quick to fluster again.]

Oh, er... no, I am fine, I assure you. [Although he does feel warm to the touch but that may be more from the embarrassment. He's very easily flustered, this one.

He shies away from his hand.] But, ah... if you wish to lend a hand to aid the ill perhaps I can ask for your assistance in something?