Make sure to review the E-learning course – Introduction to public health surveillance presentation.

The Introduction to public health surveillance presentation identified 7 uses of public health surveillance. Identify two uses that relate to epidemiology of diseases.
Discuss descriptive epidemiology aspect of disease surveillance.
Discuss the three main observational study designs, if you are to conduct an observational study of a population grouped into smokers and non-smokers. Which of the three main study designs would you use and why? Please provide in-text citation(s) to support your point of view.