Each year, typhoid fever affects up to 20 million people. Uncover what causes the infection and the fight against it with water treatment and vaccination. Dive deep into the Deadly Diseases series—part of the UpDog Books™ collection. Discover what causes these illnesses, the symptoms behind them, and what is being done to stop the spread. At the end of the book, read two patients'' symptoms and decide which one has the sickness.