"The threat of serious, cross-border infectious disease outbreaks in Europe is a significant challenge in terms of emergency preparedness. Types of threats and the pathogens involved shift in response to changing factors such as climate change, global travel, immigration patterns, environmental degradation, and social inequalities. In order to effectively target the use of resources to manage the risks of outbreak, it is necessary to formulate rankings or prioritisation of human and/or animal pathogens."
2015 European Centre for Disease Prevention and Control. Posted here with permission. Documents are for personal use only and not for commercial profit.
European Centre for Disease Prevention and Control: http://ecdc.europa.eu/