Prioritizing Health Services - People have access to health services that are prioritized to address the main causes of excess mortality and morbidity. Communicable Disease Prevention - People have access to information and services that are designed to prevent the communicable diseases that contribute most significantly to excess morbidity and mortality.  Outbreak Detection and Response - Outbreaks are prepared for, detected, investigated and controlled in a timely and effective manner. As of 2005, the number of IDPs in the world was estimated to be 25 million, with another 120 million adversely affected by conflict though not officially displaced.