Project Public Health Ready: History and Evolution of a Best Practice for Public Health Preparedness Planning.

We review the history and evolution of Project Public Health Ready and demonstrate why it is considered a best practice in public health preparedness planning. Previous articles on this program have described its impact on single health departments. We provide background information, review successes and challenges to date, and inform public health practitioners about a vetted tool for local public health planners to develop capacity and capability in all-hazards planning and response.