Code Orange, by Caroline Cooney

"Code Orange was a "one-of-a-kind." You'll never find a book that matches it . . . My only concern is that it may not grab and hook the reader first thing . . ." Reviewed by Haejin.

While conducting research for a school paper on smallpox, Mitty finds an envelope containing 100-year-old smallpox scabs and fears that he has infected himself and all of New York City.