<Li> monitoring the health situation and assessing health trends . </Li> <P> In particular, public health surveillance programs can: </P> <Ul> <Li> serve as an early warning system for impending public health emergencies; </Li> <Li> document the impact of an intervention, or track progress towards specified goals; and </Li> <Li> monitor and clarify the epidemiology of health problems, allow priorities to be set, and inform health policy and strategies . </Li> <Li> diagnose, investigate, and monitor health problems and health hazards of the community </Li> </Ul> <Li> serve as an early warning system for impending public health emergencies; </Li>

Who is considered the father of public health