We live in harmony with trillions of microbes in and on our bodies - the human microbiome. These microbes outnumber your cells by 10 to 1, and their genes outnumber yours by 100 to 1. But, what do they do? Dr. Kristine and Todd Wylie, Professors of Pediatrics at Washington University in St. Louis, discuss how they use NGS to understand the human microbiome and its association with health.