If you will be sending a potentially infectious substance by land, water, or air within, from, or through the United States, use this decision tree (flow chart) provided by the DOT to determine the proper classification for the substance. The decision tree shown below can also be found in the brochure, Transporting infectious substances safely, which is available through the U.S. Department of Transportation website. Available at: http://www.phmsa.dot.gov/staticfiles/PHMSA/DownloadableFiles/Files/Transporting_Infectious_Substances_brochure.pdf
. Accessed February 22, 2016.
The decision tree is discussed in more detail on the following pages.