Community and population priorities
A three-tier prevention triangle beside an epidemic curve annotated with the index case report and the start of contact tracing, the bars falling after the second mark.
The unit of care shifts from one patient to a population, and most community items are built on a three-level frame.
| PRIMARY | SECONDARY | TERTIARY | |
|---|---|---|---|
| Goal | Stop the disease before it starts | Find it early in people who feel fine | Limit disability once disease exists |
| Population | Well | Feels well, may already be affected | Already diagnosed |
| Examples | Immunization, seat belts, helmets, safe water, nutrition education, smoking cessation before disease appears | Screening mammography, blood pressure checks at a health fair, developmental screening, tuberculosis skin testing, school vision and hearing screening | Cardiac and stroke rehabilitation, support groups, diabetic foot care teaching after diagnosis |
| Exam word | Prevent | Screen | Restore |
Reportable and traceable Certain communicable diseases must be reported to public health authorities, and contact tracing follows. The nurse reports through the required channel. Confidentiality is preserved for the index patient while contacts are notified that they were exposed, without naming the source.
Who gets the resource Population priority favors the intervention protecting the most people at the greatest risk, which is why an outbreak in a congregate setting outranks an individual routine visit. The exam is testing whether the candidate can leave one patient in order to protect many.
The home visit The nurse assesses the environment as well as the patient: safety hazards, food security, medication storage, and caregiver strain. Personal safety planning is part of scheduling the visit. The patient's home is their territory, so the plan is negotiated rather than prescribed.
Access and disparity Cost, transportation, language, health literacy, work schedule, and trust determine whether a plan is actually followed. When a teaching plan fails, the correct answer usually addresses a barrier rather than repeating the teaching more slowly.
Memory hookPrevent, detect, limit.
Margin notereportable conditions vary by state; know yours.
Watch outa reportable disease is reported even when the patient objects. Confidentiality does not override public health law.
TakeawayAsk whether the population is well, feels well, or is already diagnosed, and the prevention level names itself.
→ P29 for triage · → BOOK 04 · P5 for isolation categories · → BOOK 13 · P5 for the immunization schedule