While they’re in lockdown, Simon lives at the sick bay. That’s no exaggeration; he sleeps on a cot, for the two hours a day he’s not running tests, processing samples, and going through medical databases with a speed that makes Jayne dizzy just to watch.
River, off pilot’s duty with Serenity’s engine down, observes her brother with clinical interest. “Nearing capacity,” she tells Jayne.
Girl’s a pain, but she’s usually right. “C’mon, Doc. Naptime.”
Simon doesn’t even look up. “I have to find the infection vector.”
“Uh-huh. Later.” Jayne doesn’t argue. He simply picks Simon up and carries him off.