Public Health Surveillance: At the Core of the Global Health Security Agenda.

Global health security involves developing the infrastructure and capacity to protect the health of people and societies worldwide. The acceleration of global travel and trade poses greater opportunities for infectious diseases to emerge and spread. The International Health Regulations (IHR) were adopted in 2005 with the intent of proactively developing public health systems that could react to the spread of infectious disease and provide better containment. Various challenges delayed adherence to the IHR. The Global Health Security Agenda came about as an international collaborative effort, working multilaterally among governments and across sectors, seeking to implement the IHR and develop the capacities to prevent, detect, and respond to public health emergencies of international concern. When examining the recent West African Ebola epidemic as a case study for global health security, both strengths and weaknesses in the public health response are evident. The central role of public health surveillance is a lesson reiterated by Ebola. Through further implementation of the Global Health Security Agenda, identified gaps in surveillance can be filled and global health security strengthened.