"Right," you say. "Your brothers were infected with Salmonella paratyphi A. They have what's called enteric fever."

"And people can die from that. It's like typhoid fever," Nora says.

"Yes."

"So how does Salmonella paratyphi A get in someone's food?"

"Some infected person didn’t wash their hands after going to the bathroom. And then handled your food."

"Oh." She makes a face. "Yuck."

More minutes slip by.

"So tell me everything," you say. "From the beginning."