1. As they walked, Brown and Polack talked idly.

2. But I bet you tell Polack jokes, right?

3. Polack says adults acquire the weak antibodies from past bouts of flu, and that they bind to the novel virus just strongly enough to make it worse.

4. Polack wasn't a bad kid", he thought, "just a little skinny guy. "

5. C. right now. They don't have to pass civil-rights legislation to make a Polack an American.