How does Anna get sick and what happens when she is sick? What does she hear?

Anna becomes sick with the flu and runs a terrible fever that leads her to start fading in and out of consciousness. When she is awake one morning, she overhears her father say that the Nazis have won the elections and that they won't be going back to Germany. Over the next month, Anna remains sick and cannot remember long stretches of time. But then she starts to return to normal and her swollen glands shrink back to normal.