In this chapter, we will address the following questions: 1. What are the main factors driving people to seek health care? 2. How are people influenced by their personal characteristics (such as age, gender, race, income and education) in seeking health care? 3. What are the main factors and forces that reduce the demand for health care? 4. What are the main factors that tend to increase the demand for health care? 5. How do health care coverage and incidence vary geographically