This title presents the history of epidemiology. Vivid text details how early studies of the spread of disease led to vaccines and medications that can halt pandemics. It also puts a spotlight on the brilliant scientists who made these advances possible. A case study on the current Ebola outbreak is also included. Useful sidebars, rich images, and a glossary help readers understand the science and its importance. Maps and diagrams provide context for critical discoveries in the field. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.