Epidemiologic sub-fields discussion guide: local disease
A three-part discussion: pick a disease in your own geographic area, tie it to an epidemiologic sub-field, give its descriptive epidemiology locally, and summarize the week's case.
Editorial process
Last reviewed · August 12, 2026
How should the disease and its sub-field be chosen?
The prompt's first move is a classification decision that determines everything after it: you pick a disease in your geographic area and tie it to one causation category — infectious, chronic, gynecological or sexually transmitted, environmental, cultural, or geographic. The choice must be defensible for your actual area, which means starting from local data rather than from a disease you find interesting. State health department profiles, county health rankings, and local surveillance reports are where a defensible pick comes from, and naming your source in the post is what separates an argued classification from an assertion. Note that several categories can fit one disease — a sexually transmitted infection with a documented local cluster has infectious, STI, and cultural dimensions at once — so say which category you are using and why it is the most explanatory for your area, rather than pretending the others do not apply.
Part two asks for descriptive epidemiology specifically, and that term has a precise content the grader will look for: person, place, and time. Person means the demographic distribution — age groups, sex, race and ethnicity, occupation or risk group as your data supports. Place means the geographic pattern at a resolution finer than the state: which counties, which neighborhoods, urban versus rural, and any clustering the surveillance data shows. Time means the temporal pattern — trend over recent years, seasonality if the disease has it, and any outbreak or inflection worth noting. Rates rather than raw counts are what make any of this comparable, so use incidence and prevalence per unit of population and say plainly which of the two you are citing, because a post reporting bare case counts cannot support the comparisons that descriptive epidemiology exists to enable in the first place.
Part three asks for a summary of the case or information discussed this week, and the efficient reading is that it wants synthesis rather than repetition: what your chosen disease's local picture reveals about the sub-field you classified it under, and what the descriptive pattern implies for prevention or surveillance in your area. Two or three sentences connecting the classification to the data pattern, and the pattern in turn to a concrete implication, will read as an actual summary rather than a recap. Keep the whole post to discussion length, cite your data sources properly, and make sure the local figures you quote can be traced back to the surveillance report they came from. A cleaning note: this record circulated with an essay-mill attribution line and a long encyclopedia-style article on epidemiology appended after the prompt; both are excluded from the brief above.
Likely learning objectives
Inferred from the brief — check these against your own rubric.
- 01Select a disease from local surveillance data rather than from interest, and cite the source.
- 02Classify it into one named causation category and justify that choice against the categories that also partly fit.
- 03Deliver descriptive epidemiology as person, place, and time — the term's actual content.
- 04Report rates rather than raw counts, naming incidence or prevalence explicitly.
- 05Write part three as synthesis connecting classification to pattern to implication.
Read the full question
Review every instruction before using the planning guidance that follows.
Turn the brief into deliverables
- 01Part One: a disease in your geographic area tied to a named epidemiologic causation category.
- 02Part Two: its descriptive epidemiology locally — person, place, and time, in rates.
- 03Part Three: a summary connecting the week's discussion to the case.
What counts as descriptive epidemiology here?
The disease and its sub-field
Choose from local surveillance data, name the causation category, and argue why it explains this disease in this area better than the neighboring categories.
Person
Give the demographic distribution the data supports — age, sex, race and ethnicity, occupation or risk group — in rates.
Place and time
Map the local geographic pattern below state level and the temporal trend, including seasonality or outbreaks where they exist.
The summary
Connect the classification to the descriptive pattern and draw the prevention or surveillance implication for your area.
Where does local surveillance data come from?
Recommended databases
- NCBI Bookshelf / StatPearls
- MedlinePlus
- State and county health departments
Search sequence
- 1.Pull your state or county health department's disease profile and pick a disease with usable local data.
- 2.Review the epidemiology reference for the sub-field definitions the classification depends on.
- 3.Extract person, place, and time figures as rates, noting incidence versus prevalence.
- 4.Draft the three parts in order, keeping the summary synthetic.
Reference shortlist
These are authoritative starting points, not a ready-made bibliography. A qualified reviewer must confirm that each source fits the assignment and supports the claim beside which it is cited.
Nothing here is cleared for citation until you have read it.
- 01
Epidemiology of Prevention of Communicable Diseases
StatPearls, NCBI Bookshelf · 2023
The sub-field vocabulary and surveillance framing behind part one's classification decision.
- 02
Health Statistics
MedlinePlus, U.S. National Library of Medicine · 2024
The gateway to national and state data sources — where defensible local incidence and prevalence figures for part two actually live.
- 03
Environmental Health
MedlinePlus, U.S. National Library of Medicine · 2024
The causation-category reference for environmental and geographic classifications, and the exposure vocabulary those arguments need.
Review before submission
Common mistakes
- Choosing a nationally famous disease with no local data behind the choice.
- Naming a causation category without arguing why it is the most explanatory one for your area.
- Writing 'descriptive epidemiology' as a definition instead of delivering person, place, and time.
- Reporting case counts where rates are needed for comparison.
- Giving place at state resolution when the prompt asks about your geographic area.
- Repeating parts one and two as the summary instead of synthesizing an implication.
Submission checklist
- Disease chosen from cited local data.
- Causation category named and justified.
- Person, place, and time each addressed.
- Incidence or prevalence rates used and labeled.
- Summary connects classification, pattern, and implication.
- Sources cited; discussion-appropriate length.
Use this guide to plan and review your own work. Follow your institution's rules and read our academic-integrity policy.

Written by
Aaron Bishop
MA, Education
assignment interpretation and research-methods coaching across disciplines
Aaron leads the EssayCrackers editorial desk. He works on how assignment briefs are read — what a rubric is actually asking for, and where students most often answer a different question than the one set.

Reviewed by
Dr. Nathan Cole
PhD, Rhetoric & Composition
Argumentation and thesis development
Nathan teaches first-year composition and directs a university writing center. He reviews EssayCrackers guides for argumentative soundness and citation accuracy.