Should health professionals be concerned about secondary contamination? How often does it occur and what are the signs that should prompt you to take extra precautions? Maureen Orr, an epidemiologist at the Centers for Disease Control's Agency for Toxic Substances and Disease Registry, talks with host Dr. Larry Kaskel about her published report, "Secondary Contamination of Medical Personnel, Equipment, and Facilities Resulting From Hazardous Materials Events, 2003-2006."