You say "yet" as if you're hoping that I'll catch it.

[He chuckles.] It's true that I have a weak immune system, especially when I'm already unwell. But I'm here, and I'm forced to push myself day to day, so there's no saying when I might catch it. I wonder if I'd die, if that were the case?

Spending time with you may be dangerous, but I still came here to check on you. Colds can quickly worsen, after all.