◆ Healthcare & Medicine

What an epidemiologist
really does.

20 tasks, each one witnessed by the sources that watched the job — and behind every one, a prompt you can use tonight.

20evidenced tasks
12,090in the US (2025)
$87,220median pay / year
10systems it runs on
See the 20 tasks ↓Open in the atlasThe full career map →
This is what one task looks like here
Conduct disease surveillance
Set up continuous surveillance for respiratory illness in County Publi…2 sources agree

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The work, task by task

20 tasks
Hands on the work8
N Map disease transmission pathways+
Produce transmission pathway maps for the recent cluster: combine case onset dates, contact interviews and movement logs, infer likely chains with dates and attack rates, and deliver an annotated map and narrative to the outbreak lead by 10 AM Tuesday.
escojd2 agree
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Use biological and statistical sciences to understand disease processes+
Analyse the latest clinical, environmental and surveillance datasets to characterise transmission pathways and key drivers of this outbreak, run appropriate inferential models, and produce a methods-and-results draft for the team by Wednesday.
wiki
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Propose risk preventive measures to health policy organisms+
Develop a ranked set of practical, evidence-based prevention measures for the health authority: estimate effect sizes from our data, model impact under three implementation scenarios, draft policy-ready recommendations with resource and equity notes for next Tuesday.
esco
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Identify and analyze public health issues related to foodborne parasitic diseases and their impact on public policies, scientific studies, or surveys.+
Map recent cases, run descriptive analyses to quantify burden, synthesize literature on foodborne parasites' policy impact, and produce a concise brief with recommendations for the public health advisory committee by the end of the month.
onet
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Prepare and analyze samples to study effects of drugs, gases, pesticides, or microorganisms on cell structure and tissue.+
Set up the next lab run to test drug and toxin effects on cultured cells, confirm sample labels and controls, log procedures in the lab notebook, and produce a results summary for the safety review meeting on Wednesday.
onet
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Identify risk factors for disease+
Analyze the cohort dataset to identify independent risk factors for severe disease, run descriptive tables, univariate comparisons, and multivariable regression adjusting for age, sex and comorbidities, then produce a one‑page summary of actionable risk factors for the public health team by Tuesday.
wiki
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Design epidemiological studies+
Design a prospective case‑control study to test vaccine effectiveness: specify inclusion and exclusion criteria, sample size justification with power calculations, sampling frame, data collection instruments, and an analysis plan with primary and secondary endpoints to review with the ethics board next Wednesday.
wiki
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Compare treatment effects in clinical trials+
Compare treatment effects across the three randomized trials by standardizing outcome definitions, perform meta‑analysis with heterogeneity assessment and sensitivity analyses, produce forest plots and a one‑page interpretation for the clinical team by Thursday.
wiki
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Grow the practice7
Watch and assess4
Work with people1

What the work runs on

named inside the evidenced tasks
7 tasksMicrosoft Wordfor study protocol, consent forms and ethics submission documentsOpen its task library → 5 tasksMicrosoft Excelfor quick aggregation, charts and the Monday situation briefOpen its task library →
4 tasksIBM SPSS Statisticsperforms sample size and statistical power calculations and prepares analysis syntax
4 tasksSASrigorous epidemiologic analyses, time-to-event and case–control modelling to support causal inference
3 tasksMicrosoft PowerPointto produce slides for the health commissioner and stakeholder meetings
3 tasksESRI ArcGIScreates geospatial maps and layered visualisations linking cases, venues and timeline to infer transmission chains
3 tasksPythonprocesses dates and contact data to assist in inferring chains and calculating attack rates
2 tasksStructured query language SQLautomates ingestion and querying of routine surveillance data to detect statistical aberrations
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The same task, four heights

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ExecuteDo today's task, with fewer mistakesyou are here → ImproveMake it easy for the next person to acceptin the atlas → DecideWork out the right move when it is unclearin the atlas → BecomeLearn the pattern so it stops coming backin the atlas →

Can AI actually do this job?

the honest answer

It can

where it genuinely helps
  • Explain the theory behind the work
  • Draft, tidy and structure your writing
  • Rehearse a hard conversation before you have it
  • Build a study plan that fits your gaps

It cannot

where it stops, completely
  • Be in the room where an epidemiologist actually works
  • Carry the responsibility when the call is wrong — that weight stays yours
  • Notice what no one wrote down: the hesitation, the thing left unsaid
  • Live with the outcome

What the work pays

two countries, two different measures

United States

this exact occupation · BLS 2025
  • $87,220 a year — the middle: half earn more, half earn less
  • The lowest tenth earn near $61,270; the top tenth near $138,800
  • 12,090 people employed in this occupation

Where the evidence lives

open any of it yourself
O*NETThe US Department of Labor's own record of this job7 of these tasks ESCOThe European skills and occupations register3 of these tasks Job descriptionsReal postings, in the wild8 of these tasks WikipediaHow the world describes this work8 of these tasks US Bureau of Labor StatisticsPay and employment, by occupation2025 figures UK NOS SFHHP2Collate, analyse and interpret surveillance data to assess risks to ponational standard

Close to this work

12 nearby
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Questions people actually ask

You will split time between data work, meetings, and field tasks. Mornings often mean cleaning datasets in Excel, Access, or SQL and running analyses in R, Python, SAS, or SPSS.

Afternoons can include writing reports in Word, mapping cases in ESRI ArcGIS, meeting with health departments to advise policy, or supervising staff and planning community surveys or sample collection.

Start with Microsoft Excel and Word for data checks and report writing, plus PowerPoint for presentations. Learn SQL basics for querying databases and ESRI ArcGIS for mapping cases.

Then pick a stats tool: SAS or IBM SPSS if your agency uses them, or Python for scripting analyses. Microsoft Access helps with smaller databases. Employers often list the exact tools.

Bureau of Labor Statistics (BLS) reports 12,090 employed epidemiologists with a median annual wage of $87,220. The lowest 10% earn about $61,270 and the top 10% about $138,800 (BLS).

Pay varies by employer (local health department, CDC, university), location, and your degrees or years of experience.

Use AI and Python as tools for cleaning data, clustering cases, or running models, but always check model assumptions and known biases. Run simple checks in Python or SAS, then validate results by hand or with another tool.

Document every step, keep raw data, and have subject-matter experts review outputs before changing policy. Never let an unvalidated model alone decide a public-health action.

Major in public health, biology, statistics, or a related field. Take courses in biostatistics, infectious disease, and GIS (ESRI ArcGIS). Practice Excel, SQL, and a stats language like Python or SAS.

Volunteer at a local health department, help with surveillance or surveys, and aim for an MPH (master of public health) with epidemiology if you want higher-level roles.

Epidemiologists study patterns, causes, and prevention of disease in populations using stats, surveys, and surveillance. They design studies, map transmission, and propose policy.

Clinical researchers run clinical trials to test treatments on patients; public health nurses deliver care and community programs. Tasks overlap (surveys, data), but epidemiologists focus on population-level analysis and policy guidance.