Western Governors University

D224: Global and Population Health

A study guide to WGU's D224, the RN to BSN course on epidemiology, social determinants, community services, disaster preparedness and environmental health.

Updated October 2026 · 5 min read

D224 Global and Population Health prepares nurses to protect and promote health across whole populations. It is worth four competency units in Western Governors University's B.S. Nursing (RN to BSN), one more than most nursing courses in the program.

WGU's program guide outlines basic epidemiology, social determinants of health (SDOH) and resource allocation through value-based care. It introduces planning, organizing and delivering services for diverse populations in community settings, including illness prevention, disaster preparedness and environmental health.

All prior courses in the sequence are prerequisites, and the course is eligible for an In Progress grade.

The shift from one patient to a population is the main hurdle. Instead of asking "what does this patient need?", D224 asks "what does this community need, and how do we know?"

Course at a Glance

ItemDetails
UniversityWestern Governors University (WGU)
Course codeD224
ProgramB.S. Nursing (RN to BSN)
Competency units4
PrerequisitesAll prior courses in the program sequence
Typical workCommunity or population analysis, data interpretation, intervention planning

What D224 Covers

Competency (summarized)What it means in practice
Distinguish global, public and population healthKnowing the scope and focus of each
Identify SDOH and interventionsSpotting the social causes of poor health and equitable responses
Identify epidemiological data sourcesFinding reliable data to guide interventions
Explain global trends and capacityHow trends such as pandemics or aging affect health services
Evaluate environmental health solutionsAir, water, housing and climate effects on health

Key Concepts Explained

Global, Public and Population Health

Rates, Not Raw Numbers

Epidemiology compares groups using rates. Incidence counts new cases over a period; prevalence counts all existing cases at a point in time.

Example: Town A reports 60 new cases of a disease in a year among 20,000 residents; Town B reports 90 among 60,000. Town B has more cases, but Town A's incidence is 3 per 1,000 against Town B's 1.5 per 1,000. Resources should follow the higher rate, not the larger count.

Levels of Prevention

Primary prevention stops disease before it starts (vaccination). Secondary prevention finds it early (screening). Tertiary prevention limits complications in established disease (rehabilitation).

Example: For type 2 diabetes in a low-income neighborhood: primary, a community walking group and healthier corner-shop options; secondary, free glucose screening at a community event; tertiary, foot checks and diabetes education at the local clinic.

Typical Assignments and How to Approach Them

Task typeWhat it testsHow to approach it
Community assessmentPopulation needsUse official data and name the SDOH
Intervention planPrevention and equityMatch the level of prevention to the problem
Data analysisEpidemiologyUse rates and cite the data source
Disaster or environment taskPreparednessCover risks, vulnerable groups and resources

Turning SDOH into Interventions

Naming social determinants is the easy part; the competency asks for interventions that make care more equitable. A practical way to plan is to match each determinant with a nursing or community response and a measure.

DeterminantPossible interventionMeasure
Food insecurityScreening plus referral to food programsReferrals completed
TransportMobile clinic or telehealth visitsMissed appointment rate
Housing qualityHome asthma trigger assessmentAsthma emergency visits
Health literacyPlain-language materials, teach-backPatient understanding scores

Strong answers also name partners: schools, faith groups, housing agencies or local government. Population health rarely improves through health services alone, and showing that you understand this is part of the BSN-level shift.

Where Students Get Stuck

Study Tips for D224

How We Help with D224

Send your task instructions, the community or population you chose and your draft. A nursing tutor explains epidemiology and SDOH, helps you find appropriate data sources and reviews your plan for clarity and APA style. Our community health assignment guide has more on this kind of work.

GradeEssays is independent of Western Governors University. We teach, explain and give feedback; you complete and submit your own work under WGU's academic integrity policy.

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Share your instructions and draft. A nursing tutor gives feedback on data use, interventions and APA style.

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Frequently Asked Questions

How many competency units is D224?

Four, in WGU's B.S. Nursing (RN to BSN) program guide.

What are the prerequisites for D224?

The program guide lists all prior courses in the program sequence as prerequisites.

What is the difference between incidence and prevalence?

Incidence counts new cases over a period. Prevalence counts all existing cases at a point in time.

Where can I find population data?

Public health agencies, census data and peer-reviewed studies are reliable starting points. Use the sources your course resources recommend.

Does D224 include disaster preparedness?

Yes. The program guide lists disaster preparedness and environmental health among the course topics.

Can you write my D224 community assessment?

No. We help you understand the data and plan, and we review your draft; the work you submit is yours.