WGU D589: Chronic and Infectious Diseases

What D589 is really about

D589 Chronic and Infectious Diseases is a three-competency-unit course in Western Governors University's Bachelor of Science in Public Health, offered through the Leavitt School of Health. It usually shows up in the later half of the program, once you already have some grounding in public health foundations, statistics, and research methods. The course asks a deceptively simple question: how do the diseases that shape our communities actually work, and what can a public health professional do about them? To answer it, you study the epidemiology, pathophysiology, prevention, and management of both chronic conditions (think diabetes, heart disease, and other long-term illnesses) and infectious diseases (from familiar respiratory infections to outbreak-prone pathogens).

Direct answer: Treat D589 as a writing and research task, not a memorization test. Read the task prompt and rubric first, pick one chronic or infectious disease you can research thoroughly, and build your submission point by point against every rubric aspect using reputable sources like the CDC or WHO. You pass by clearly meeting each rubric requirement, not by cramming facts.

The students who take D589 are public health majors, not clinical nurses, so you are not being trained to treat patients at the bedside. Instead, you are learning to think at the population level: who gets sick, why, where the data comes from, and how a community can be educated to prevent and control disease. That population lens is what connects this course to the rest of your degree and to real public health work in health departments, nonprofits, and community organizations.

It matters because chronic and infectious diseases remain among the largest drivers of illness and cost worldwide, and public health work increasingly rewards people who can translate disease data into clear, actionable community strategy. D589 is where you practice exactly that translation. For the official program overview, see WGU's Bachelor of Science in Public Health page.

How D589 is assessed

D589 is completed through a performance assessment rather than a proctored, timed, multiple-choice exam. In practice that means you submit written work that is scored against a rubric by a WGU evaluator, and you can revise and resubmit if any section is not yet passing. This is good news and a subtle trap at the same time: there is no clock forcing mistakes, but there is also nowhere to hide a section you skimmed. Every rubric aspect has to be addressed explicitly and clearly, in your own words, with credible support. Assessment formats can change over time, so confirm the current setup on your official course page before you begin.

What the assessment covers

Based on WGU's published competencies, the course centers on three things you must be able to do. Expect the task to draw on all of them:

• Causes and impacts: explaining what drives chronic and infectious diseases and how they affect individuals and populations.
• Reputable data sources: identifying and using credible, authoritative sources of disease and health data for a defined population.
• Community education strategy: developing a strategy to educate a community on the prevention and control of a chronic or infectious disease.

Underneath those competencies you will work with the building blocks of disease study: basic epidemiology (how disease spread and burden are measured and described), the pathophysiology of the disease you choose (how it actually harms the body), and the prevention and management levers available at the population level. You do not need to master every disease on earth. You need to demonstrate the method on the disease your task asks about, or one you select.

How hard D589 is, and how long it takes

Difficulty here is less about raw intellectual challenge and more about whether you are comfortable writing a structured, evidence-backed document. Many students find performance-assessment courses like this one more approachable than heavy proctored exams because there is no memorization gauntlet and you control the pace. The friction usually comes from two places: getting comfortable with epidemiology vocabulary if public health is new to you, and disciplining your writing so it maps cleanly to the rubric.

Because everyone arrives with different backgrounds and writing speed, avoid anchoring on someone else's timeline. A realistic approach is to reserve focused blocks over one to a few weeks: a couple of sessions to learn the material and gather sources, then dedicated time to draft, self-check against the rubric, and polish. If you already work in health or have taken epidemiology, expect it to move faster. If you connect the population-level thinking to courses like D224 Global and Population Health, the concepts will feel far less foreign.

A study and task plan that works for D589

Because this is a written deliverable, your studying should be structured around producing that deliverable, while still using proven learning techniques to lock in the concepts.

• Reverse-engineer the rubric first. Before you read a single chapter, print the task instructions and rubric and turn every rubric aspect into a heading in your draft. This guarantees you address each one and makes evaluation predictable.
• Use active recall on the core vocabulary. Terms like incidence, prevalence, transmission, and risk factor need to be second nature. Quiz yourself by writing plain-language definitions from memory, then check them, rather than re-reading passively.
• Choose your disease early and specifically. A well-scoped disease (one clear chronic or infectious condition) is far easier to research and educate about than a broad, vague topic. Specificity is your friend.
• Build a source shortlist. Lean on authoritative bodies such as the CDC, WHO, and peer-reviewed public health literature. Note where each fact came from as you go so citations are painless later.
• Space your work. Draft one rubric section per sitting instead of marathoning the whole thing. Spacing your effort over several days improves retention and produces cleaner writing than a single rushed session.
• Self-evaluate like the grader will. After drafting, reread each section and ask, "Would a reviewer check this box?" If you are not sure, you have found the section to strengthen. This is your version of practice testing.

The community-education competency is the heart of the task, and it echoes the kind of population-focused strategy you practice in D450 Community Health and Population-Focused Nursing and the systems view in D776 Healthcare Leadership and Community Engagement. Borrowing that mindset here helps you write a strategy that is realistic rather than generic.

Mistakes that slow students down in D589

• Writing an essay instead of answering the rubric. Beautiful prose that ignores a required aspect still comes back for revision. Structure beats style.
• Choosing a topic that is too broad. "Infectious diseases" is not a topic; a single named disease with a clear population is.
• Leaning on weak sources. Blogs, class notes, and unsourced summaries undermine credibility. Anchor claims in authoritative public health data.
• Confusing chronic and infectious frameworks. Prevention and control strategies differ; applying an infectious-disease approach to a chronic condition, or the reverse, reads as a misunderstanding.
• Vague community education plans. "Raise awareness" is not a strategy. Name the audience, the message, the channel, and how prevention or control improves.
• Skipping the self-check. Submitting without matching every paragraph to a rubric aspect is the most common reason for an avoidable resubmission.

D589 Readiness Checklist

Before you submit, make sure you can honestly answer yes to each of these:

• Can you explain the causes and population-level impacts of the chronic or infectious disease you chose?
• Can you describe that disease's basic pathophysiology in plain, accurate language?
• Can you name at least two reputable data sources and point to specific data you used from them?
• Can you distinguish prevention from control, and apply the right one to your disease?
• Can you lay out a community-education strategy with a defined audience and clear messaging?
• Can you match every paragraph of your submission to a specific rubric aspect?
• Can you show that your claims are supported by credible sources rather than opinion?
• Can you read your draft aloud and confirm it is entirely in your own words?

D589 FAQ

Is WGU D589 an OA or a PA?

D589 is completed through a performance assessment: you submit written work scored against a rubric, rather than sitting a proctored multiple-choice exam. Because the course's culminating competency is developing a community-education strategy, the deliverable is task-based. Always confirm the current format in your official course page, since WGU updates courses over time.

How many competency units is D589 worth?

According to WGU's Bachelor of Science in Public Health program guidebook, Chronic and Infectious Diseases is listed as a three-competency-unit course. Competency units are WGU's measure of course weight toward your degree.

Is D589 a nursing course?

No. It is part of the Bachelor of Science in Public Health, not a nursing program. The focus is population-level disease study and community education, not bedside clinical care, so the work is analytical and public-health oriented.

How hard is D589?

Many students find performance-assessment courses like this manageable because there is no timed exam and you can revise. The main challenges are getting comfortable with epidemiology terms and writing precisely to the rubric. Your background in public health and writing will influence how quickly it goes.

What should I study first?

Start with the task instructions and rubric, then learn the core epidemiology vocabulary and the pathophysiology of the specific disease you choose. Gathering a short list of authoritative sources early makes the rest of the work much smoother.

Where can I find more WGU study guides?

You can browse related Leavitt School of Health courses on the health college hub, or see the full library on the all guides index to plan the rest of your program.