P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
Epidemiology Exam
Questions & Answers
2026/2027 Comprehensive
Updated Edition
(Rationales)
Verified Answers Exam Ready With Rationales 145 QUESTIONS
DOCUMENT OVERVIEW
This comprehensive resource provides 145 updated epidemiology exam questions, each
paired with its correct answer and detailed rationales. It covers fundamental
epidemiological concepts and their applications. This document is suitable for in-depth
study, thorough review, and effective preparation for epidemiology certification exams.
TOPICS
• Foundations of Epidemiology • Historical Figures and Milestones
• Disease Occurrence and Transmission • Epidemiological Measures and
Calculations
• Outbreak Investigation and • Mortality, Morbidity, and Survival
Surveillance
• Screening and Diagnostic Testing • Data Sources and Applications
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 145
Epidemiology
ANSWER
It is the study of the distribution and determinants of health related states or events in specific
populations and the application of this study to control health problems.
RATIONALE
Epidemiology investigates patterns of health and disease within populations to understand their
causes and effects. It involves assessing how often health events occur, who is affected, and the
factors influencing these occurrences. The ultimate goal is to utilize this knowledge for public
health interventions and disease prevention.
Q2 QUESTION 2 OF 145
Two assumptions inherent in epi studies
ANSWER
1. Diseases are NOT randomly distributed in populations.
2. Diseases have specific causes that can be identified, prevented, and treated.
RATIONALE
Epidemiology fundamentally operates on the premise that disease occurrence is non-random and
influenced by specific, identifiable factors. This understanding underpins the field's ability to
investigate patterns, identify etiologies, and develop targeted interventions for disease prevention
and control within populations.
Q3 QUESTION 3 OF 145
Functions of Epidemiology
Page 2
, ANSWER
- To discover the agent, host, and environmental factors which affect health, in order to provide
the scientific basis for the prevention of disease and injury and the promotion of health.
- To determine the relative importance of causes of illness, disability, and death, in order to
establish priorities for research and action.
- To identify those sections of the population which have the greatest risk from specific causes
of ill health, in order that the indicated action may be directed appropriately.
- To evaluate the effectiveness of health programs and services in improving the health of the
population.
Q4 QUESTION 4 OF 145
Objectives of Epidemiology
ANSWER
1. To identify the etiology (cause) of a disease and the risk factors associated with the disease.
2. To determine the extent of disease found in the community. What is the burden of disease?
3. To study the natural history and prognosis of the disease
4. To evaluate both existing and new preventative and therapeutic measures and modes of
health care delivery
5. To provide the foundation for developing public policy and regulatory decisions relating to
epidemiologic problems
Q5 QUESTION 5 OF 145
Issues in Epidemiology
ANSWER
-Where there is a link between factor and health outcome - does this mean the factor is the
cause of disease?
-Is there is an association, does the amount of disease vary according to the amount of
exposure to the factor?
-Based on the observation of such an association, what practical steps should individuals and
public health departments take?
-Do the findings from an epidemiologic study merit panic or measured response?
-How applicable are the findings to settings other than the one in which the research was
conducted?
Page 3
, Q6 QUESTION 6 OF 145
Epidemiological Approach
ANSWER
-Observation
-Definition of disease process
-Descriptive epidemiology
-Analytical Epidemiology
-Experimental Epidemiology
RATIONALE
The epidemiological approach systematically investigates health phenomena, beginning with
unbiased observation and precise disease definition. It then progresses through descriptive
studies to characterize disease patterns, followed by analytical studies to identify causes and risk
factors, and finally, experimental studies to test interventions. This structured methodology allows
for comprehensive understanding and control of disease in populations.
Q7 QUESTION 7 OF 145
Surveillance
ANSWER
Ongoing and systematic collection, analysis and interpretation of health related data
-Assess public health status, define public health problems, evaluate programs, stimulate
research
RATIONALE
Effective public health surveillance involves the continuous, systematic gathering and evaluation of
health information. This process is fundamental for monitoring population health trends,
identifying health priorities, and assessing the impact of interventions and research initiatives.
Q8 QUESTION 8 OF 145
Primary prevention
ANSWER
prevention or cessation of risk factor exposure (active or passive)
Page 4
Epidemiology Exam
Questions & Answers
2026/2027 Comprehensive
Updated Edition
(Rationales)
Verified Answers Exam Ready With Rationales 145 QUESTIONS
DOCUMENT OVERVIEW
This comprehensive resource provides 145 updated epidemiology exam questions, each
paired with its correct answer and detailed rationales. It covers fundamental
epidemiological concepts and their applications. This document is suitable for in-depth
study, thorough review, and effective preparation for epidemiology certification exams.
TOPICS
• Foundations of Epidemiology • Historical Figures and Milestones
• Disease Occurrence and Transmission • Epidemiological Measures and
Calculations
• Outbreak Investigation and • Mortality, Morbidity, and Survival
Surveillance
• Screening and Diagnostic Testing • Data Sources and Applications
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 145
Epidemiology
ANSWER
It is the study of the distribution and determinants of health related states or events in specific
populations and the application of this study to control health problems.
RATIONALE
Epidemiology investigates patterns of health and disease within populations to understand their
causes and effects. It involves assessing how often health events occur, who is affected, and the
factors influencing these occurrences. The ultimate goal is to utilize this knowledge for public
health interventions and disease prevention.
Q2 QUESTION 2 OF 145
Two assumptions inherent in epi studies
ANSWER
1. Diseases are NOT randomly distributed in populations.
2. Diseases have specific causes that can be identified, prevented, and treated.
RATIONALE
Epidemiology fundamentally operates on the premise that disease occurrence is non-random and
influenced by specific, identifiable factors. This understanding underpins the field's ability to
investigate patterns, identify etiologies, and develop targeted interventions for disease prevention
and control within populations.
Q3 QUESTION 3 OF 145
Functions of Epidemiology
Page 2
, ANSWER
- To discover the agent, host, and environmental factors which affect health, in order to provide
the scientific basis for the prevention of disease and injury and the promotion of health.
- To determine the relative importance of causes of illness, disability, and death, in order to
establish priorities for research and action.
- To identify those sections of the population which have the greatest risk from specific causes
of ill health, in order that the indicated action may be directed appropriately.
- To evaluate the effectiveness of health programs and services in improving the health of the
population.
Q4 QUESTION 4 OF 145
Objectives of Epidemiology
ANSWER
1. To identify the etiology (cause) of a disease and the risk factors associated with the disease.
2. To determine the extent of disease found in the community. What is the burden of disease?
3. To study the natural history and prognosis of the disease
4. To evaluate both existing and new preventative and therapeutic measures and modes of
health care delivery
5. To provide the foundation for developing public policy and regulatory decisions relating to
epidemiologic problems
Q5 QUESTION 5 OF 145
Issues in Epidemiology
ANSWER
-Where there is a link between factor and health outcome - does this mean the factor is the
cause of disease?
-Is there is an association, does the amount of disease vary according to the amount of
exposure to the factor?
-Based on the observation of such an association, what practical steps should individuals and
public health departments take?
-Do the findings from an epidemiologic study merit panic or measured response?
-How applicable are the findings to settings other than the one in which the research was
conducted?
Page 3
, Q6 QUESTION 6 OF 145
Epidemiological Approach
ANSWER
-Observation
-Definition of disease process
-Descriptive epidemiology
-Analytical Epidemiology
-Experimental Epidemiology
RATIONALE
The epidemiological approach systematically investigates health phenomena, beginning with
unbiased observation and precise disease definition. It then progresses through descriptive
studies to characterize disease patterns, followed by analytical studies to identify causes and risk
factors, and finally, experimental studies to test interventions. This structured methodology allows
for comprehensive understanding and control of disease in populations.
Q7 QUESTION 7 OF 145
Surveillance
ANSWER
Ongoing and systematic collection, analysis and interpretation of health related data
-Assess public health status, define public health problems, evaluate programs, stimulate
research
RATIONALE
Effective public health surveillance involves the continuous, systematic gathering and evaluation of
health information. This process is fundamental for monitoring population health trends,
identifying health priorities, and assessing the impact of interventions and research initiatives.
Q8 QUESTION 8 OF 145
Primary prevention
ANSWER
prevention or cessation of risk factor exposure (active or passive)
Page 4
