Who knows what book I'm talking about?

I read it in high school. It historical fiction was set in World War 2 Poland, I believe. There were two stories going on. One was about blowing up a supply train to the Nazis and the other story was about a nurse, I think, who works in a hospital. I remember the supply train story was about a group of Jewish people hiding out in the country. The other story had a TB or Typhoid quarrantine. There was a young Nazi soldier who didn’t want to go back to the front lines. It was about taking a passive action and an agressive action and how those strategies work.

I swear it was called Night Trains, but the Internet disagrees with me.