 The focus of public health interventions is to prevent and manage diseases, injuries and other health conditions through surveillance of cases and the promotion of healthy behavior, communities, and (in aspects relevant to human health) environments.Its aim is to prevent health problems from happening or re-occurring by implementing educational programs, developing policies, administering services and conducting research.In many cases, treating a disease or controlling a pathogen can be vital to preventing it in others, such as during an outbreak.