WGU D450 COMMUNITY HEALTH HESI
2025 Latest Update | Questions and Answers | 100% Correct
Course Code D450
Course Title Community Health
Exam Type HESI Specialty Exam Review
Total Questions 50
Sections 5 (10 Questions Each)
Date Prepared June 15, 2026
Academic Year 2025-2026
Abstract
This document provides a comprehensive 50-question HESI specialty exam review for WGU D450 Community
Health. Questions are organized into five sections covering foundations of community health nursing and
epidemiology, vulnerable populations and health disparities, environmental and occupational health, healthcare
systems and policy, and community assessments with program planning including 2026 updates. Each question
includes four answer options with rationales, correct answer identification, cognitive level classification, and topic
alignment. This review is designed to prepare nursing students for the HESI Community Health specialty
examination with scenario-based questions that reflect current clinical practice and public health evidence.
Keywords: Community Health Nursing, HESI Review, Epidemiology, Public Health, Vulnerable Populations,
Environmental Health, Healthcare Policy, Health Disparities, Social Determinants of Health, Program Planning, Health
Education, PRECEDE-PROCEED, MAPP Model, Healthy People 2030, Telehealth, AI in Public Health
,Section 1: Foundations of Community Health Nursing & Epidemiology
Q1-Q10
Question 1. A community health nurse is planning a health fair that includes blood pressure screening,
immunization administration, and a support group for stroke survivors. Which activity represents
secondary prevention?
■ A. Blood pressure screening to detect hypertension early
B. Immunization administration to prevent communicable diseases
C. Support group for stroke survivors to maximize rehabilitation
D. Distributing educational pamphlets on healthy eating habits
Correct Answer: A
Rationale: Health education aimed at preventing disease onset is primary prevention, not secondary prevention.
Question 2. During a community outbreak of hepatitis A, the public health nurse identifies that the
agent is the hepatitis A virus, the host susceptibility is increased in the homeless population, and the
environment includes contaminated food sources at a local shelter. This assessment best demonstrates
application of which epidemiological model?
■ A. Epidemiological triad (agent-host-environment model)
B. Natural history of disease model
C. Web of causation model
D. Health belief model
Correct Answer: A
Rationale: The health belief model explains individual health behavior based on perceived susceptibility, severity, benefits, and
barriers, not disease causation.
Question 3. A public health nurse is reviewing data from a county with a population of 50,000. During
2025, 250 new cases of diabetes were diagnosed. What is the incidence rate of diabetes in this county?
■ A. 5 per 1,000 population
B. 0.5 per 1,000 population
C. 50 per 1,000 population
D. 0.05 per 1,000 population
Correct Answer: A
Rationale: This miscalculates 250/50,000 as 0.00005 rather than the correct 0.005.
Question 4. A community health nurse notes that in a rural county of 10,000 people, the usual rate of
pertussis is 2 cases per month. Over the past 3 months, there have been 45 cases. The nurse should
classify this situation as which of the following?
■ A. An epidemic, because the observed cases exceed the expected baseline
B. An endemic pattern, because pertussis is always present in the community
C. A pandemic, because pertussis has spread across multiple counties
D. A sporadic occurrence, because the cases appeared randomly
Correct Answer: A
Rationale: Sporadic cases occur occasionally and irregularly. Forty-five cases in 3 months in a small population represents a
clearly defined excess, not sporadic occurrence.
Question 5. A community health nurse is explaining the concept of herd immunity to a parent who is
hesitant about vaccinating their child. Which statement by the nurse best explains the principle of herd
immunity?
■ A. "When a high percentage of the community is immune, the spread of disease is unlikely, which provides
indirect protection to those who cannot be vaccinated."
B. "Your child needs to be vaccinated because only individual immunity can protect them from disease."
C. "Herd immunity means that natural infection is the best way to build immunity in a community."
, D. "Once a disease is eliminated globally, herd immunity is no longer necessary in any community."
Correct Answer: A
Rationale: Herd immunity remains important as long as there is any risk of reintroduction of disease from outside the
community.
Question 6. A community health nurse is conducting a tuberculosis contact investigation. Which
nursing intervention primarily targets the 'portal of exit' in the chain of infection?
■ A. Teaching the client to cover the mouth and nose when coughing or sneezing
B. Ensuring the client wears an N95 respirator when in public areas
C. Ventilating the client's living space with fresh outdoor air
D. Administering isoniazid preventive therapy to close contacts
Correct Answer: A
Rationale: Preventive therapy targets the susceptible host, reducing the likelihood that exposed individuals will develop disease.
Question 7. A public health epidemiologist is investigating a sudden increase in foodborne illness at a
community festival. Which type of epidemiology is primarily being used to identify the source of the
outbreak?
■ A. Analytical epidemiology, through a case-control study comparing food exposures between ill and well
attendees
B. Descriptive epidemiology, by characterizing cases by person, place, and time only
C. Experimental epidemiology, by conducting a randomized controlled trial of food safety interventions
D. Ecological epidemiology, by comparing county-level foodborne illness rates across the state
Correct Answer: A
Rationale: Ecological studies examine group-level associations, not individual-level exposures relevant to a specific outbreak
investigation.
Question 8. A researcher wants to study whether exposure to pesticides increases the risk of
Parkinson's disease among agricultural workers in the Midwest. The researcher enrolls 500 farm
workers with known pesticide exposure and 500 non-exposed office workers and follows both groups
for 15 years. This study design is best described as:
■ A. A prospective cohort study comparing incidence rates between exposed and unexposed groups
B. A case-control study comparing pesticide exposure histories between those with and without Parkinson's disease
C. A cross-sectional study measuring prevalence of Parkinson's disease at a single point in time
D. A randomized controlled trial assigning participants to pesticide exposure groups
Correct Answer: A
Rationale: It would be unethical to randomly assign people to pesticide exposure. This is an observational study, not an
experimental trial.
Question 9. A community health nurse is reviewing the evidence linking air pollution to increased
asthma rates in an urban community. The nurse finds that the association has been replicated in
multiple cities worldwide, the risk increases with higher pollution levels, and reducing pollution leads
to decreased asthma admissions. Which Bradford Hill criteria are demonstrated by these findings?
■ A. Consistency, dose-response relationship, and temporality with reversibility (analogy/experiment)
B. Strength of association, biological plausibility, and specificity alone
C. Coherence, specificity, and biological gradient only
D. Only association and temporality are demonstrated
Correct Answer: A
Rationale: Multiple criteria beyond association and temporality are demonstrated, including consistency and dose-response.
Question 10. A community health nurse is designing a colorectal cancer screening program for adults
aged 45-75. The nurse explains to community leaders that screening colonoscopies aim to detect cancer
in which stage of the natural history of disease?
■ A. Early asymptomatic stage (presymptomatic/early pathologic changes)
B. Susceptibility stage before any biological changes occur
2025 Latest Update | Questions and Answers | 100% Correct
Course Code D450
Course Title Community Health
Exam Type HESI Specialty Exam Review
Total Questions 50
Sections 5 (10 Questions Each)
Date Prepared June 15, 2026
Academic Year 2025-2026
Abstract
This document provides a comprehensive 50-question HESI specialty exam review for WGU D450 Community
Health. Questions are organized into five sections covering foundations of community health nursing and
epidemiology, vulnerable populations and health disparities, environmental and occupational health, healthcare
systems and policy, and community assessments with program planning including 2026 updates. Each question
includes four answer options with rationales, correct answer identification, cognitive level classification, and topic
alignment. This review is designed to prepare nursing students for the HESI Community Health specialty
examination with scenario-based questions that reflect current clinical practice and public health evidence.
Keywords: Community Health Nursing, HESI Review, Epidemiology, Public Health, Vulnerable Populations,
Environmental Health, Healthcare Policy, Health Disparities, Social Determinants of Health, Program Planning, Health
Education, PRECEDE-PROCEED, MAPP Model, Healthy People 2030, Telehealth, AI in Public Health
,Section 1: Foundations of Community Health Nursing & Epidemiology
Q1-Q10
Question 1. A community health nurse is planning a health fair that includes blood pressure screening,
immunization administration, and a support group for stroke survivors. Which activity represents
secondary prevention?
■ A. Blood pressure screening to detect hypertension early
B. Immunization administration to prevent communicable diseases
C. Support group for stroke survivors to maximize rehabilitation
D. Distributing educational pamphlets on healthy eating habits
Correct Answer: A
Rationale: Health education aimed at preventing disease onset is primary prevention, not secondary prevention.
Question 2. During a community outbreak of hepatitis A, the public health nurse identifies that the
agent is the hepatitis A virus, the host susceptibility is increased in the homeless population, and the
environment includes contaminated food sources at a local shelter. This assessment best demonstrates
application of which epidemiological model?
■ A. Epidemiological triad (agent-host-environment model)
B. Natural history of disease model
C. Web of causation model
D. Health belief model
Correct Answer: A
Rationale: The health belief model explains individual health behavior based on perceived susceptibility, severity, benefits, and
barriers, not disease causation.
Question 3. A public health nurse is reviewing data from a county with a population of 50,000. During
2025, 250 new cases of diabetes were diagnosed. What is the incidence rate of diabetes in this county?
■ A. 5 per 1,000 population
B. 0.5 per 1,000 population
C. 50 per 1,000 population
D. 0.05 per 1,000 population
Correct Answer: A
Rationale: This miscalculates 250/50,000 as 0.00005 rather than the correct 0.005.
Question 4. A community health nurse notes that in a rural county of 10,000 people, the usual rate of
pertussis is 2 cases per month. Over the past 3 months, there have been 45 cases. The nurse should
classify this situation as which of the following?
■ A. An epidemic, because the observed cases exceed the expected baseline
B. An endemic pattern, because pertussis is always present in the community
C. A pandemic, because pertussis has spread across multiple counties
D. A sporadic occurrence, because the cases appeared randomly
Correct Answer: A
Rationale: Sporadic cases occur occasionally and irregularly. Forty-five cases in 3 months in a small population represents a
clearly defined excess, not sporadic occurrence.
Question 5. A community health nurse is explaining the concept of herd immunity to a parent who is
hesitant about vaccinating their child. Which statement by the nurse best explains the principle of herd
immunity?
■ A. "When a high percentage of the community is immune, the spread of disease is unlikely, which provides
indirect protection to those who cannot be vaccinated."
B. "Your child needs to be vaccinated because only individual immunity can protect them from disease."
C. "Herd immunity means that natural infection is the best way to build immunity in a community."
, D. "Once a disease is eliminated globally, herd immunity is no longer necessary in any community."
Correct Answer: A
Rationale: Herd immunity remains important as long as there is any risk of reintroduction of disease from outside the
community.
Question 6. A community health nurse is conducting a tuberculosis contact investigation. Which
nursing intervention primarily targets the 'portal of exit' in the chain of infection?
■ A. Teaching the client to cover the mouth and nose when coughing or sneezing
B. Ensuring the client wears an N95 respirator when in public areas
C. Ventilating the client's living space with fresh outdoor air
D. Administering isoniazid preventive therapy to close contacts
Correct Answer: A
Rationale: Preventive therapy targets the susceptible host, reducing the likelihood that exposed individuals will develop disease.
Question 7. A public health epidemiologist is investigating a sudden increase in foodborne illness at a
community festival. Which type of epidemiology is primarily being used to identify the source of the
outbreak?
■ A. Analytical epidemiology, through a case-control study comparing food exposures between ill and well
attendees
B. Descriptive epidemiology, by characterizing cases by person, place, and time only
C. Experimental epidemiology, by conducting a randomized controlled trial of food safety interventions
D. Ecological epidemiology, by comparing county-level foodborne illness rates across the state
Correct Answer: A
Rationale: Ecological studies examine group-level associations, not individual-level exposures relevant to a specific outbreak
investigation.
Question 8. A researcher wants to study whether exposure to pesticides increases the risk of
Parkinson's disease among agricultural workers in the Midwest. The researcher enrolls 500 farm
workers with known pesticide exposure and 500 non-exposed office workers and follows both groups
for 15 years. This study design is best described as:
■ A. A prospective cohort study comparing incidence rates between exposed and unexposed groups
B. A case-control study comparing pesticide exposure histories between those with and without Parkinson's disease
C. A cross-sectional study measuring prevalence of Parkinson's disease at a single point in time
D. A randomized controlled trial assigning participants to pesticide exposure groups
Correct Answer: A
Rationale: It would be unethical to randomly assign people to pesticide exposure. This is an observational study, not an
experimental trial.
Question 9. A community health nurse is reviewing the evidence linking air pollution to increased
asthma rates in an urban community. The nurse finds that the association has been replicated in
multiple cities worldwide, the risk increases with higher pollution levels, and reducing pollution leads
to decreased asthma admissions. Which Bradford Hill criteria are demonstrated by these findings?
■ A. Consistency, dose-response relationship, and temporality with reversibility (analogy/experiment)
B. Strength of association, biological plausibility, and specificity alone
C. Coherence, specificity, and biological gradient only
D. Only association and temporality are demonstrated
Correct Answer: A
Rationale: Multiple criteria beyond association and temporality are demonstrated, including consistency and dose-response.
Question 10. A community health nurse is designing a colorectal cancer screening program for adults
aged 45-75. The nurse explains to community leaders that screening colonoscopies aim to detect cancer
in which stage of the natural history of disease?
■ A. Early asymptomatic stage (presymptomatic/early pathologic changes)
B. Susceptibility stage before any biological changes occur
