1. What are the three core functions of public health? Explain each function briefly and give an example of how it is implemented in practice. - The three core functions of public health are assessment, policy development and assurance. Assessment involves collecting and analyzing data on the health status and needs of the population, such as conducting surveys, surveillance and epidemiological studies. Policy development involves designing and advocating for interventions that address the identified health problems and priorities, such as developing guidelines, regulations and programs. Assurance involves ensuring that the policies and interventions are effectively delivered and evaluated, such as providing quality assurance, monitoring and feedback mechanisms. 2. What are the main determinants of health? How do they interact to influence health outcomes? - The main determinants of health are the social, economic, environmental and biological factors that affect the health of individuals and populations. They interact in complex and dynamic ways to influence health outcomes, such as morbidity, mortality and quality of life. For example, poverty, education, housing, pollution, genetics, lifestyle and access to health care are some of the determinants that can have positive or negative effects on health. 3. What is the difference between primary, secondary and tertiary prevention? Give an example of each level of prevention in public health. - Primary prevention aims to prevent the occurrence of disease or injury by reducing exposure to risk factors or enhancing protective factors, such as immunization, sanitation and health education. Secondary prevention aims to detect and treat disease or injury early to prevent complications or progression, such as screening, diagnosis and treatment. Tertiary prevention aims to reduce the impact or disability caused by disease or injury by restoring function or providing rehabilitation, such as surgery, physiotherapy and palliative care.