Preparing for medical or public health exams can feel like navigating a labyrinth, especially when you are staring down the dual giants of Epidemiology and Demography. These subjects are the backbone of health sciences, focusing on how diseases spread and how human populations change over time. To help you sharpen your skills, we have curated a deep-dive revision session in a question-and-answer format.
Below is the exam paper download link
Past Paper On Epidemiology And Demography For Revision
Above is the exam paper download link
Below, you will find critical concepts frequently tested in professional assessments. After reviewing these, you can use the link provided at the end of this post to download the full past paper for your personal study.
Section 1: The Core of Epidemiology
Question 1: How do we distinguish between endemic, epidemic, and pandemic levels of disease? In the world of public health, scale is everything. An endemic disease is one that is constantly present in a specific population or geographic area—think of it as the “baseline” level of a cough or virus. An epidemic occurs when the number of cases suddenly spikes above what is normally expected. When that spike crosses international borders and affects multiple continents, it graduates to a pandemic.
Question 2: What is the primary difference between Incidence and Prevalence? This is a classic exam trap. Incidence refers to the number of new cases that develop in a population during a specific timeframe. It measures risk. Prevalence, on the other hand, is a snapshot of all cases (both new and pre-existing) at a specific point in time. If incidence is the water flowing into a bathtub, prevalence is the total amount of water in the tub.
Question 3: Why is the “Epidemiologic Triad” fundamental to disease control? To stop a disease, you must understand the relationship between the Agent (the microbe), the Host (the human/animal), and the Environment (the external factors). By breaking one side of this triangle—perhaps through vaccination (host) or water purification (environment)—you can effectively halt the spread of infection.
Section 2: Insights into Demography
Question 4: What are the three main components of population change? Demography isn’t just about counting people; it’s about understanding movement. The three pillars are Fertility (birth rates), Mortality (death rates), and Migration (people moving in or out). Every population shift on Earth can be traced back to the interaction of these three variables.
Question 5: What does a “Population Pyramid” with a wide base signify? A wide base on a population pyramid indicates a high birth rate and a large proportion of young people. This usually suggests a developing economy where the population is growing rapidly. Conversely, a narrow base indicates declining birth rates and an aging population, which presents different challenges for healthcare and social security systems.
Question 6: How do we calculate the Dependency Ratio, and why does it matter? The dependency ratio is calculated by taking the number of people who are typically not in the labor force (the very young and the elderly) and dividing it by the working-age population. A high ratio means the “productive” part of society is under significant pressure to support those who cannot work.
Section 3: Practical Application
Question 7: How does Demography influence Epidemiological trends? They are two sides of the same coin. For instance, if a demographer notes that a population is aging (higher life expectancy), an epidemiologist can predict a rise in non-communicable diseases like cancer or heart disease. Understanding who the people are (demography) tells us what diseases they are likely to face (epidemiology).
Take Your Revision Further
Reading through these questions is an excellent start, but nothing beats the “real thing.” Testing yourself under timed conditions is the best way to build the mental stamina required for final exams. Whether you are a student at a national polytechnic or a university medical program, these resources are designed to bridge the gap between theory and practice.
Last updated on: March 17, 2026