Quiz: Public Health Foundations¶
Test your understanding of public health history, core functions, and the determinants of health with these review questions.
1. Which of the following best defines public health as a discipline?¶
- The clinical treatment of individual patients in hospital settings
- The science and art of preventing disease and promoting health through organized community effort
- The manufacture and distribution of pharmaceuticals for population use
- The study of human anatomy and physiology across the lifespan
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The correct answer is B. Public health is distinguished from medicine by its focus on populations rather than individuals, and on prevention and health promotion rather than treatment. Winslow's classic definition emphasizes organized community effort — the collective, governmental, and institutional structures through which population health is protected and improved.
Concept Tested: Definition of Public Health
2. The "epidemiological triad" model of disease causation consists of which three elements?¶
- Host, agent, and environment
- Exposure, outcome, and confounding
- Primary, secondary, and tertiary prevention
- Biology, behavior, and social determinants
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The correct answer is A. The epidemiological triad models disease as the product of interaction among a host (the human being at risk), an agent (the biological, chemical, or physical cause), and an environment (the conditions that bring host and agent together). This framework underlies traditional infectious disease epidemiology and helps identify points of intervention.
Concept Tested: Epidemiological Triad
3. A vaccination campaign is an example of which level of prevention?¶
- Tertiary prevention
- Secondary prevention
- Primordial prevention
- Primary prevention
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The correct answer is D. Primary prevention stops disease before it occurs by reducing exposure or increasing resistance. Vaccination prevents susceptible individuals from becoming infected, acting before any disease process begins. Secondary prevention involves early detection of existing disease; tertiary prevention reduces disability from established disease; primordial prevention addresses upstream social conditions.
Concept Tested: Levels of Prevention
4. The three core functions of public health, as defined by the 1988 Institute of Medicine report, are:¶
- Treatment, rehabilitation, and case management
- Assessment, policy development, and assurance
- Surveillance, investigation, and reporting
- Education, research, and accreditation
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The correct answer is B. The 1988 IOM report "The Future of Public Health" established assessment (collecting and analyzing health data), policy development (using data to guide public health policy), and assurance (ensuring services are available and accessible) as the three core governmental functions of public health. These provide the organizing framework for the ten Essential Public Health Services.
Concept Tested: Core Functions of Public Health
5. The "social determinants of health" refers primarily to:¶
- The genetic factors that predispose individuals to specific diseases
- The conditions in which people are born, grow, live, work, and age
- The quality of a nation's hospital infrastructure and physician supply
- Individual health behaviors such as diet, exercise, and smoking
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The correct answer is B. The social determinants of health are the non-medical factors that shape health outcomes — housing, education, income, employment, neighborhood safety, and social inclusion. The WHO Commission on Social Determinants of Health emphasized that these "causes of the causes" explain a far greater share of population health variation than healthcare access or individual behaviors alone.
Concept Tested: Social Determinants of Health
6. The Lalonde Report (1974) was significant because it:¶
- Established the World Health Organization's mandate for global health governance
- Proved that universal healthcare systems reduce infant mortality
- Shifted attention beyond healthcare to lifestyle and environmental determinants of health
- Introduced the concept of randomized controlled trials in public health
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The correct answer is C. Canada's Lalonde Report "A New Perspective on the Health of Canadians" proposed a "health field" concept with four determinants: human biology, environment, lifestyle, and healthcare organization. By showing that healthcare spending was only one of four influences on health, it catalyzed a paradigm shift toward prevention and population health thinking that prefigured the modern social determinants framework.
Concept Tested: Lalonde Health Field Model
7. Primary care, public health departments, and community organizations working together to address food insecurity in a neighborhood best exemplifies which concept?¶
- Vertical integration of hospital systems
- Accountable Care Organizations
- Health in All Policies
- The clinical model of care
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The correct answer is C. Health in All Policies (HiAP) is a collaborative approach that incorporates health considerations into decision-making across sectors — housing, transportation, education, agriculture, and beyond. When primary care, public health, and community organizations jointly address food insecurity, they are operationalizing HiAP by treating a social determinant through cross-sector coordination rather than clinical intervention alone.
Concept Tested: Health in All Policies
8. The "One Health" framework recognizes that:¶
- A single universal healthcare system is optimal for all nations
- Human health, animal health, and environmental health are interconnected
- Infectious disease control requires one standardized global protocol
- All health determinants can be addressed through a single policy instrument
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The correct answer is B. One Health is an integrated approach recognizing that the health of people is closely connected to the health of animals and the environment. Most emerging infectious diseases — including COVID-19, Ebola, and influenza — originate in animals (zoonoses), and environmental degradation drives wildlife-human contact. Effective pandemic prevention requires surveillance and intervention at the human-animal-environment interface.
Concept Tested: One Health Framework
9. The Healthy People initiative, first launched in 1979, is best described as:¶
- A federal health insurance program for low-income populations
- A national framework of measurable health objectives guiding public health action
- An international treaty for reducing infectious disease burden
- A surveillance system tracking hospital readmission rates
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The correct answer is B. Healthy People is a federal initiative that sets ten-year national health objectives to improve the health of all Americans. Each decade's edition (currently Healthy People 2030) identifies priority areas, sets measurable targets, and tracks progress — providing a common agenda for federal, state, local, and community public health efforts.
Concept Tested: Healthy People Initiative
10. Which statement best describes the difference between incidence and prevalence?¶
- Incidence measures disease severity; prevalence measures disease duration
- Incidence counts new cases occurring in a time period; prevalence counts all existing cases at a point or during a period
- Incidence applies only to chronic disease; prevalence applies only to acute disease
- Incidence is calculated per 1,000 people; prevalence is always expressed as a percentage
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The correct answer is B. Incidence measures the rate at which new cases develop in a population at risk over a specified time period — it captures disease occurrence. Prevalence measures the proportion of a population that has a condition at a given point in time or during a period — it captures disease burden. The relationship is: prevalence ≈ incidence × average disease duration.
Concept Tested: Incidence vs. Prevalence