Advanced Health Assessment for Patients and Populations — Outbreak Investigation Review
WGU D028 AJM3 – ADVANCED HEALTH ASSESSMENTS FOR PATIENTS AND
POPULATIONS: CRAB APPLE VALLEY COMMUNICABLE OUTBREAK
SCENARIO PRESENTATION QUESTIONS AND CORRECT ANSWERS |
2026/2027
WGU D028 AJM3 Advanced Health Assessments for Patients and Populations
Crab Apple Valley Communicable Outbreak Scenario Presentation
1. During a communicable disease outbreak investigation in a rural
valley community, which step should the team complete first according
to the CDC framework?
A. Formulate hypotheses about the source
B. Communicate findings to the public
C. Prepare for field work
D. Implement control and prevention measures
ANSWER : C. Prepare for field work
Preparation covers background research, supplies, administrative
arrangements and team roles before investigators enter the field.
Page 1 of 61
, Advanced Health Assessment for Patients and Populations — Outbreak Investigation Review
2. After preparing for field work, what is the next priority in the
outbreak investigation?
A. Issue a community press release
B. Establish the existence of an outbreak
C. Conduct a case-control study
D. Close local schools and businesses
ANSWER : B. Establish the existence of an outbreak
Investigators must confirm that observed cases exceed the expected
baseline before committing further resources.
3. A public health nurse compares this month's reported
gastrointestinal illness cases with the same month over the previous
five years. This action primarily serves to:
A. Evaluate vaccine effectiveness
B. Identify the causative organism
C. Determine whether the observed number of cases exceeds the expected
baseline
D. Calculate the case-fatality rate
ANSWER : C. Determine whether the observed number of cases
exceeds the expected baseline
Comparing current counts with historical data shows whether case
numbers are higher than normally expected.
4. Why is verifying the diagnosis an essential early step in an outbreak
investigation?
A. It guarantees the outbreak source will be identified
B. It determines which agency will fund the response
C. It confirms the illness is correctly diagnosed and rules out laboratory
error
D. It replaces the need for a case definition
ANSWER : C. It confirms the illness is correctly diagnosed and rules
out laboratory error
Reviewing clinical findings and lab results ensures the increase is real and
not caused by misdiagnosis or testing artifacts.
Page 2 of 61
, Advanced Health Assessment for Patients and Populations — Outbreak Investigation Review
5. Organizing outbreak data by time, place and person is part of which
investigative step?
A. Evaluating hypotheses with analytic epidemiology
B. Performing descriptive epidemiology
C. Communicating findings
D. Conducting environmental studies
ANSWER : B. Performing descriptive epidemiology
Descriptive epidemiology characterizes the outbreak by who is ill, where,
and when.
6. Which step of an outbreak investigation tests hypotheses using a
comparison group?
A. Performing descriptive epidemiology
B. Establishing the existence of an outbreak
C. Preparing for field work
D. Evaluating hypotheses epidemiologically
ANSWER : D. Evaluating hypotheses epidemiologically
Analytic studies such as cohort or case-control designs compare groups to
test suspected exposures.
7. Control and prevention measures during an outbreak should be
implemented:
A. Only after federal authorities give approval
B. Only after the final written report is approved
C. Only after every case is laboratory confirmed
D. As soon as possible, even before the investigation is complete
ANSWER : D. As soon as possible, even before the investigation is
complete
Protecting the public takes priority, so control measures begin as soon as
the likely source or mode of spread is known.
Page 3 of 61
, Advanced Health Assessment for Patients and Populations — Outbreak Investigation Review
8. When an analytic study does not support the original hypothesis, the
investigator should:
A. Publish the original hypothesis as confirmed
B. Reconsider the hypotheses and conduct additional studies
C. Close the investigation immediately
D. Assume all laboratory results were wrong
ANSWER : B. Reconsider the hypotheses and conduct additional
studies
Unsupported hypotheses require refining ideas and gathering more data
rather than ending the investigation.
9. The final step of an outbreak investigation typically involves:
A. Developing the case definition
B. Communicating findings to stakeholders
C. Verifying the diagnosis
D. Preparing for field work
ANSWER : B. Communicating findings to stakeholders
Findings are shared through briefings, reports and presentations so
decision-makers and the public can act.
10. Which is the BEST example of an environmental study during a
suspected foodborne outbreak?
A. Drawing an epidemic curve
B. Interviewing cases about their symptoms
C. Calculating food-specific attack rates
D. Collecting food and surface samples from the implicated kitchen
ANSWER : D. Collecting food and surface samples from the
implicated kitchen
Environmental studies examine the physical source, such as food, water
or surfaces, to support epidemiologic findings.
Page 4 of 61
WGU D028 AJM3 – ADVANCED HEALTH ASSESSMENTS FOR PATIENTS AND
POPULATIONS: CRAB APPLE VALLEY COMMUNICABLE OUTBREAK
SCENARIO PRESENTATION QUESTIONS AND CORRECT ANSWERS |
2026/2027
WGU D028 AJM3 Advanced Health Assessments for Patients and Populations
Crab Apple Valley Communicable Outbreak Scenario Presentation
1. During a communicable disease outbreak investigation in a rural
valley community, which step should the team complete first according
to the CDC framework?
A. Formulate hypotheses about the source
B. Communicate findings to the public
C. Prepare for field work
D. Implement control and prevention measures
ANSWER : C. Prepare for field work
Preparation covers background research, supplies, administrative
arrangements and team roles before investigators enter the field.
Page 1 of 61
, Advanced Health Assessment for Patients and Populations — Outbreak Investigation Review
2. After preparing for field work, what is the next priority in the
outbreak investigation?
A. Issue a community press release
B. Establish the existence of an outbreak
C. Conduct a case-control study
D. Close local schools and businesses
ANSWER : B. Establish the existence of an outbreak
Investigators must confirm that observed cases exceed the expected
baseline before committing further resources.
3. A public health nurse compares this month's reported
gastrointestinal illness cases with the same month over the previous
five years. This action primarily serves to:
A. Evaluate vaccine effectiveness
B. Identify the causative organism
C. Determine whether the observed number of cases exceeds the expected
baseline
D. Calculate the case-fatality rate
ANSWER : C. Determine whether the observed number of cases
exceeds the expected baseline
Comparing current counts with historical data shows whether case
numbers are higher than normally expected.
4. Why is verifying the diagnosis an essential early step in an outbreak
investigation?
A. It guarantees the outbreak source will be identified
B. It determines which agency will fund the response
C. It confirms the illness is correctly diagnosed and rules out laboratory
error
D. It replaces the need for a case definition
ANSWER : C. It confirms the illness is correctly diagnosed and rules
out laboratory error
Reviewing clinical findings and lab results ensures the increase is real and
not caused by misdiagnosis or testing artifacts.
Page 2 of 61
, Advanced Health Assessment for Patients and Populations — Outbreak Investigation Review
5. Organizing outbreak data by time, place and person is part of which
investigative step?
A. Evaluating hypotheses with analytic epidemiology
B. Performing descriptive epidemiology
C. Communicating findings
D. Conducting environmental studies
ANSWER : B. Performing descriptive epidemiology
Descriptive epidemiology characterizes the outbreak by who is ill, where,
and when.
6. Which step of an outbreak investigation tests hypotheses using a
comparison group?
A. Performing descriptive epidemiology
B. Establishing the existence of an outbreak
C. Preparing for field work
D. Evaluating hypotheses epidemiologically
ANSWER : D. Evaluating hypotheses epidemiologically
Analytic studies such as cohort or case-control designs compare groups to
test suspected exposures.
7. Control and prevention measures during an outbreak should be
implemented:
A. Only after federal authorities give approval
B. Only after the final written report is approved
C. Only after every case is laboratory confirmed
D. As soon as possible, even before the investigation is complete
ANSWER : D. As soon as possible, even before the investigation is
complete
Protecting the public takes priority, so control measures begin as soon as
the likely source or mode of spread is known.
Page 3 of 61
, Advanced Health Assessment for Patients and Populations — Outbreak Investigation Review
8. When an analytic study does not support the original hypothesis, the
investigator should:
A. Publish the original hypothesis as confirmed
B. Reconsider the hypotheses and conduct additional studies
C. Close the investigation immediately
D. Assume all laboratory results were wrong
ANSWER : B. Reconsider the hypotheses and conduct additional
studies
Unsupported hypotheses require refining ideas and gathering more data
rather than ending the investigation.
9. The final step of an outbreak investigation typically involves:
A. Developing the case definition
B. Communicating findings to stakeholders
C. Verifying the diagnosis
D. Preparing for field work
ANSWER : B. Communicating findings to stakeholders
Findings are shared through briefings, reports and presentations so
decision-makers and the public can act.
10. Which is the BEST example of an environmental study during a
suspected foodborne outbreak?
A. Drawing an epidemic curve
B. Interviewing cases about their symptoms
C. Calculating food-specific attack rates
D. Collecting food and surface samples from the implicated kitchen
ANSWER : D. Collecting food and surface samples from the
implicated kitchen
Environmental studies examine the physical source, such as food, water
or surfaces, to support epidemiologic findings.
Page 4 of 61
