"Bobby?"

He steered Dean towards the kitchen.

"What's wrong with Sam?"

Bobby gathered drugs, turning to the older Winchester.

"Yeasles."

Dean stared.

"Come again?"

"He's got the Yeasles. It's a secondary infection from the case of Yellow Fever you had. His temp's already up. By tomorrow, he'll be covered in yellow spots and itching."

Dean's eyebrow's raised.

"Little sleep, crappy food," Bobby shrugged. "Sam got worn down, he got infected. That makes you Typhoid Mary in the Supernatural sense. Here."

Dean took the Tylenol and juice, then looked hopefully at Bobby.

"No, I won't tell him for you."

Dean sighed.