"That...depends." Senku said, doing the calculations in his mind. "If you get by with an incident, catch it early and it's not particularly brutal, you could maybe make do with a three day course of antibiotics, but it really depends on the bacteria involved. It's good that you have it, but it's not going to be enough especially if something is so contagious it spreads throughout the train."

He didn't like that idea at all. The idea of a pathogen gaining ground in an enclosed space worried him.

"In fact we'd be helpless to an infection just because of the close quarters." He murmured that more for his own benefit.

"Sounds woefully inadequate, and maybe I should be looking at the flora here."