"Public health emergency preparedness (PHEP) is the capability of the public health and health-care systems, communities, and individuals to prevent, protect against, quickly respond to, and recover from health emergencies, particularly those whose scale, timing, or unpredictability threatens to overwhelm routine capabilities. Preparedness involves a coordinated and continuous process of planning and implementation that relies on measuring performance and taking corrective action". (Nelson et al, American Journal of Public Health, 2007, p. S9; Adopted by Altevogt, Research Priorities in EP&R...., Jan2008, 9