Preventive services can be categorized into three levels:
Primary Prevention: Aims to prevent disease before it occurs. Examples include immunizations, use of seat belts, and smoking cessation programs. Secondary Prevention: Focuses on early disease detection to halt or slow its progress. Examples include mammograms for breast cancer and blood pressure screening. Tertiary Prevention: Targets individuals who already have a disease, aiming to improve quality of life and reduce disease-related complications. Examples include rehabilitation programs and chronic disease management.