Public water supplies are treated to kill any organisms that could make you sick, but waterborne viruses, bacteria and parasites continue to cause illness and even death in the U.S. A panel talks about how giardia, cryptosporidium, E. coli and other nasty "bugs" still plague Americans, and what's being done about it.
of the National Institute of Allergy and Infectious Diseases
of the Environmental Protection Agency
infectious disease physician at George Washington University Medical Center
of the Centers for Disease Control and Prevention