Skip to content

Quiz: Global Health

Test your understanding of global burden of disease, health transitions, international governance, and global health equity with these review questions.

1. Disability-Adjusted Life Years (DALYs) are calculated as:

  1. Years of life lost to premature mortality only
  2. Years lived with disability only, weighted by severity
  3. The sum of years of life lost (YLL) and years lived with disability (YLD)
  4. Average life expectancy minus actual age at death for a population
Show Answer

The correct answer is C. DALYs = YLL + YLD. Years of Life Lost (YLL) capture premature mortality by comparing actual age at death to expected age at death from a reference life table. Years Lived with Disability (YLD) capture morbidity by multiplying time spent in a health state by a disability weight (0 = full health, 1 = death). DALYs provide a unified metric for comparing the burden of conditions causing premature death versus those causing disability, enabling allocation comparisons across the global disease landscape.

Concept Tested: DALY Calculation

2. The epidemiological transition describes the shift in leading causes of death from:

  1. Non-communicable diseases to infectious diseases as income rises
  2. Infectious and nutritional diseases to chronic non-communicable diseases during economic development
  3. Acute illnesses to chronic conditions primarily driven by aging alone
  4. Single-cause deaths to multi-morbidity patterns in all countries simultaneously
Show Answer

The correct answer is B. Omran's epidemiological transition theory describes how countries moving through economic and social development experience a shift in dominant causes of mortality from infectious, nutritional, and reproductive diseases (high-mortality stage) to chronic non-communicable diseases — cardiovascular disease, cancer, diabetes (low-mortality stage). Many low- and middle-income countries now face a "double burden" of both infectious and non-communicable diseases simultaneously.

Concept Tested: Epidemiological Transition

3. Universal Health Coverage (UHC) is defined as ensuring that:

  1. All countries adopt a single-payer healthcare financing model
  2. All people receive needed health services without suffering financial hardship
  3. All nations achieve the same level of health outcomes by 2030
  4. All essential medicines are provided free of charge by national governments
Show Answer

The correct answer is B. The WHO defines Universal Health Coverage as all people having access to the health services they need, when and where they need them, without financial hardship. UHC encompasses three dimensions: population coverage (who is covered), service coverage (which services are covered), and financial protection (how much of the cost is covered). It does not mandate a specific financing model — countries achieve UHC through a variety of insurance, tax-funded, and mixed systems.

Concept Tested: Universal Health Coverage Definition

4. The International Health Regulations (IHR) 2005 require WHO member states to:

  1. Contribute a fixed percentage of GDP to international health financing
  2. Report Public Health Emergencies of International Concern (PHEICs) and build core surveillance capacities
  3. Accept WHO inspection teams whenever disease outbreaks are suspected
  4. Adhere to WHO treatment guidelines for all notifiable diseases
Show Answer

The correct answer is B. The IHR 2005 is a legally binding international agreement requiring WHO member states to notify the WHO of events that may constitute a Public Health Emergency of International Concern (PHEIC), and to develop, strengthen, and maintain core public health capacities for surveillance, detection, assessment, reporting, and response. The IHR's enforcement mechanism is weak — there are no sanctions for non-reporting — a limitation exposed during COVID-19's early weeks.

Concept Tested: International Health Regulations (IHR 2005)

5. Neglected tropical diseases (NTDs) are characterized by which combination of features?

  1. High mortality burden primarily affecting populations in high-income countries
  2. Predominantly affecting the poorest populations with limited political voice and receiving disproportionately little research investment
  3. Diseases for which no effective prevention or treatment currently exists
  4. Conditions caused exclusively by vector-borne transmission requiring insecticide programs
Show Answer

The correct answer is B. NTDs — a group of approximately 20 conditions including schistosomiasis, lymphatic filariasis, onchocerciasis, Chagas disease, and leishmaniasis — predominantly affect the poorest populations in tropical and subtropical regions. They cause substantial disability (typically measured in YLD rather than YLL), rarely kill quickly, and have historically received limited research investment relative to their disease burden. Effective, low-cost interventions exist for many NTDs; the barrier is funding and implementation, not the absence of tools.

Concept Tested: Neglected Tropical Diseases

6. Sustainable Development Goal 3 (SDG 3) is specifically focused on:

  1. Zero hunger and food security
  2. Good health and well-being for all ages
  3. Clean water and sanitation access
  4. Quality education for all
Show Answer

The correct answer is B. SDG 3, "Good Health and Well-Being," sets targets across a broad range of health outcomes: reducing maternal and child mortality, ending epidemic AIDS/TB/malaria/NTDs, reducing non-communicable disease premature mortality, achieving UHC, and strengthening health systems by 2030. It succeeded the Millennium Development Goals' health targets and situates health within the broader 17-goal sustainable development framework.

Concept Tested: Sustainable Development Goal 3

7. The demographic transition model predicts that as countries develop economically, birth rates:

  1. Rise continuously in parallel with improved nutrition and healthcare
  2. Decline after a lag following the earlier decline in death rates
  3. Remain stable while death rates continue to fall
  4. Decline simultaneously with death rates without any lag period
Show Answer

The correct answer is B. The demographic transition model describes how countries move from high birth rates and high death rates (pre-industrial) to low birth rates and low death rates (post-industrial). Death rates typically fall first — driven by improved sanitation, nutrition, and healthcare — while birth rates continue high for a period (the "lag phase"), producing rapid population growth. As fertility declines (driven by education, urbanization, women's empowerment, contraceptive access), population growth slows and eventually stabilizes.

Concept Tested: Demographic Transition Model

8. COVAX, the global COVID-19 vaccine access initiative, failed to meet its first-year targets primarily because:

  1. Vaccines developed under COVAX proved less effective than expected in clinical trials
  2. Low-income countries lacked cold-chain infrastructure to receive any vaccine doses
  3. High-income countries purchased excess doses through bilateral deals, reducing supply available for COVAX
  4. The WHO lacked legal authority to compel vaccine manufacturers to supply COVAX
Show Answer

The correct answer is C. COVAX's vaccine supply was severely constrained because high-income countries signed bilateral advance purchase agreements with manufacturers — purchasing far more doses than their populations needed — before COVAX could secure adequate supply. By end-2021, high-income countries had administered approximately 70% of global vaccine doses while low-income countries had administered less than 2%. This "vaccine nationalism" was the primary structural driver of COVAX's shortfall.

Concept Tested: COVAX and Vaccine Equity

9. The "global burden of disease" attributable to the leading single risk factor worldwide is most accurately attributed to:

  1. Tobacco use
  2. Unsafe water, sanitation, and hygiene
  3. High systolic blood pressure
  4. Air pollution (outdoor and indoor combined)
Show Answer

The correct answer is C. According to the Global Burden of Disease study, high systolic blood pressure is consistently ranked as the leading risk factor for global disease burden (measured in DALYs and deaths attributable), primarily through its contribution to ischemic heart disease and stroke. The ranking shifts depending on the metric and year, and tobacco (option A) and air pollution (option D) are also among the top five risk factors globally, but hypertension has topped the list in recent GBD reports.

Concept Tested: Leading Global Risk Factors

10. The Declaration of Alma-Ata (1978) is historically significant because it:

  1. Established the World Health Organization as the lead global health governance body
  2. Articulated the vision of "Health for All" through primary health care as a human right and global priority
  3. Created the framework for international pharmaceutical patent protection under TRIPS
  4. Committed all nations to achieve universal healthcare coverage by the year 2000
Show Answer

The correct answer is B. The Declaration of Alma-Ata, adopted at the International Conference on Primary Health Care in 1978, proclaimed health as a fundamental human right and called for "Health for All by the Year 2000" through the development of primary health care systems accessible to all people. It represented a major philosophical and political statement that health equity and primary care were global priorities — a vision that shaped subsequent WHO frameworks and global health policy.

Concept Tested: Declaration of Alma-Ata