NR 442: Community Health Nursing - Epidemiology & Disease
Prevention Practice Pack 2026 |Chamberlain College
1. A community health nurse is conducting an education session about the
epidemiological triangle. Which of the following should the nurse include as an
example of an ‘Agent’?
A. Age of the population
B. Access to healthcare
C. Chemical toxins
D. Climatic conditions
Answer: C
Rationale: In the epidemiological triangle, the ‘Agent’ refers to the factor that must be
present or lacking for a disease or condition to develop, such as bacteria, viruses, or
chemical toxins.
2. Which of the following interventions represents primary prevention for
communicable diseases?
A. Providing DOT (Directly Observed Therapy) for a client with TB
B. Performing skin tests for tuberculosis exposure
C. Leading a support group for individuals living with HIV
D. Administering the influenza vaccine to elderly residents
Answer: D
Rationale: Primary prevention aims to prevent the onset of disease through measures
such as immunization and health education. Influenza vaccination is a classic primary
prevention strategy.
,3. The nurse is investigating an outbreak of food poisoning. Which of the
following calculations will best determine the likelihood of having developed
the illness among those who ate a specific food item?
A. Attack rate
B. Incidence rate
C. Crude death rate
D. Prevalence rate
Answer: A
Rationale: The attack rate is a specialized form of incidence rate used in outbreak
investigations to determine the proportion of persons who are exposed to an agent and
develop the disease.
4. A public health nurse is reviewing data on the total number of existing cases
of Type 2 Diabetes in a specific county. This value represents which of the
following?
A. Mortality
B. Incidence
C. Prevalence
D. Virulence
Answer: C
Rationale: Prevalence refers to the number of all existing cases (old and new) of a disease
in a population at a specific point in time.
5. What is the goal of secondary prevention in community health?
A. To reduce the impact of a long-term disease
B. To identify and treat a disease in its earliest stages
C. To eliminate the agent from the environment
D. To increase herd immunity in a population
Answer: B
, Rationale: Secondary prevention focuses on early detection and prompt treatment to limit
the severity of the disease, often through screening programs.
6. Which component of the epidemiological triangle includes factors such as
social support and poverty?
A. Agent
B. Environment
C. Host
D. Vector
Answer: B
Rationale: The environment includes external factors that influence the host’s
vulnerability to the agent, including physical, social, and economic conditions like poverty.
7. A nurse is teaching about ‘Herd Immunity.’ Which statement by a student
indicates an understanding of the concept?
A. Individuals are protected because they have had the disease before.
B. Immunity is passed from a mother to her baby through breast milk.
C. Protection occurs when a large part of the population is immune to a disease.
D. It is the immunity gained after receiving a full course of antibiotics.
Answer: C
Rationale: Herd immunity occurs when a significant portion of a community is immune to
an infectious disease, making the spread of the disease from person to person unlikely.
8. The nurse is assessing the ‘Web of Causality’ for heart disease. What is the
primary focus of this model?
A. Identifying a single cause for the disease
B. Tracing the path of infection from person to person
C. Focusing solely on genetic predispositions
D. Understanding the complex interaction of multiple risk factors
Answer: D
Prevention Practice Pack 2026 |Chamberlain College
1. A community health nurse is conducting an education session about the
epidemiological triangle. Which of the following should the nurse include as an
example of an ‘Agent’?
A. Age of the population
B. Access to healthcare
C. Chemical toxins
D. Climatic conditions
Answer: C
Rationale: In the epidemiological triangle, the ‘Agent’ refers to the factor that must be
present or lacking for a disease or condition to develop, such as bacteria, viruses, or
chemical toxins.
2. Which of the following interventions represents primary prevention for
communicable diseases?
A. Providing DOT (Directly Observed Therapy) for a client with TB
B. Performing skin tests for tuberculosis exposure
C. Leading a support group for individuals living with HIV
D. Administering the influenza vaccine to elderly residents
Answer: D
Rationale: Primary prevention aims to prevent the onset of disease through measures
such as immunization and health education. Influenza vaccination is a classic primary
prevention strategy.
,3. The nurse is investigating an outbreak of food poisoning. Which of the
following calculations will best determine the likelihood of having developed
the illness among those who ate a specific food item?
A. Attack rate
B. Incidence rate
C. Crude death rate
D. Prevalence rate
Answer: A
Rationale: The attack rate is a specialized form of incidence rate used in outbreak
investigations to determine the proportion of persons who are exposed to an agent and
develop the disease.
4. A public health nurse is reviewing data on the total number of existing cases
of Type 2 Diabetes in a specific county. This value represents which of the
following?
A. Mortality
B. Incidence
C. Prevalence
D. Virulence
Answer: C
Rationale: Prevalence refers to the number of all existing cases (old and new) of a disease
in a population at a specific point in time.
5. What is the goal of secondary prevention in community health?
A. To reduce the impact of a long-term disease
B. To identify and treat a disease in its earliest stages
C. To eliminate the agent from the environment
D. To increase herd immunity in a population
Answer: B
, Rationale: Secondary prevention focuses on early detection and prompt treatment to limit
the severity of the disease, often through screening programs.
6. Which component of the epidemiological triangle includes factors such as
social support and poverty?
A. Agent
B. Environment
C. Host
D. Vector
Answer: B
Rationale: The environment includes external factors that influence the host’s
vulnerability to the agent, including physical, social, and economic conditions like poverty.
7. A nurse is teaching about ‘Herd Immunity.’ Which statement by a student
indicates an understanding of the concept?
A. Individuals are protected because they have had the disease before.
B. Immunity is passed from a mother to her baby through breast milk.
C. Protection occurs when a large part of the population is immune to a disease.
D. It is the immunity gained after receiving a full course of antibiotics.
Answer: C
Rationale: Herd immunity occurs when a significant portion of a community is immune to
an infectious disease, making the spread of the disease from person to person unlikely.
8. The nurse is assessing the ‘Web of Causality’ for heart disease. What is the
primary focus of this model?
A. Identifying a single cause for the disease
B. Tracing the path of infection from person to person
C. Focusing solely on genetic predispositions
D. Understanding the complex interaction of multiple risk factors
Answer: D
