It's a small reprieve that they'll need some time to prepare. Assuming that's time they'll be given. He doesn't try to suggest putting it off again, for as long as he's tried that. While he's better now, it's going to build up again until he's cured.

So he nods, thankful that he doesn't press him on having that discussion sooner, or blaming him for not doing it already. His problems are a distraction they don't need.

"You'll let me know if there's anything else I need to do." If anyone should be hunting down ingredients, it should be him.

He has one other concern, and it involves getting cured only to be flung back into the past before it happened. "There's a chance... something might go awry if we're pulled through time. That's how I ended up like this."