The Forum on Microbial Threats staff and planning committee deeply appreciate the many valuable contributions from individuals who assisted with this project. Thank you to Casey Barton Behravesh, Tracey Dutcher, Mark G. Kortepeter, Maureen Lichtveld, Anne-Marie Mazza, and Liz Mumford for their insightful feedback and discussion that helped to shape the workshop charge. Our colleagues Lisa Brown, Melvin Joppy, Matthew Masiello, Emilie Ryan-Castillo, Carolyn Shore, and Scott Wollek provided invaluable assistance in the organization and logistics of the workshop. Finally, the workshop and this Proceedings of a Workshop would not be possible without the work of the planning committee members, the leadership of the committee co-chairs, and the presenters and discussants at the workshop, who gave so generously of their time and expertise.