A children's book about the importance of handwashing, drinking clean water, and avoiding contaminated food for good health.Stan, a 3rd grader, goes to school and encounters a virus, a bacterium, a protozoan, and a parasitic worm, all of which can cause abdominal pain and diarrhea. By taking simple precautions, he can avoid getting sick from these diseases.This book is appropriate for children in grades 3 through 6.