Narrated by Dr. Tom Peters, University of Iowa College of Public Health. Animations by Derek Siebert, University of Iowa Information Technology Services. Funding for the Midwest Emerging Technologies Public Health and Safety Training (METPHAST) Program is provided by the National Institute of Environmental Health Sciences of the National Institutes of Health under Award Number R25ES023595. The content is solely the responsibility of the developers and does not necessarily represent the official views of the National Institutes of Health.