Design an intervention
Choose a public-health action that fits the problem, and place it at the right prevention level: stopping illness before it starts, catching it early, or limiting harm after.
- Matching a solution to the problem it solves: An intervention is only useful if it targets the actual cause or risk you found, so you must be able to link a proposed action back to the problem it addresses.
- Ordering events before, during, and after: Prevention levels are defined by timing relative to the illness; you have to be able to place an action before, at the start of, or after disease to choose the right level.
Prerequisites are inferred: pending teacher review.
Re-learn the skill with worked practice and clear examples.
An intervention is a planned action to improve health. Its prevention level is set by timing: primary acts before illness, secondary catches it early, tertiary limits harm after someone is already ill.
A clinic offers free blood-pressure screening at a health fair so people can catch high blood pressure early, before it causes damage. Which prevention level is this?
Reviewed- A.Primary prevention
- B.Secondary prevention
- C.Tertiary prevention
- D.It is not a prevention level at all
Show the worked solution ▾
Answer: B. Secondary prevention
- Step 1: Check the timing: The goal is to catch a condition early, before it causes damage: not to stop it from ever starting, and not to treat advanced illness.
- Step 2: Match to a level: Catching disease early is the definition of secondary prevention.
Why it's right: Screening to find a condition early, before it causes harm, is secondary prevention by definition.
- A: Primary prevention stops disease from starting; screening does not stop high blood pressure from forming, it detects it.
- C: Tertiary prevention manages disease that is already advanced; this fair is catching it early instead.
- D: Screening is a recognized prevention activity, so this is a real prevention level.
Aligned to BI 5.1: prevention levels · reading level ~grade 9
- A health team designing a campaign labels each action primary, secondary, or tertiary so leaders can see whether they are stopping, catching, or managing the illness.
Fill these in as you work through the lesson.
- Intervention (the action you take to change the outcome):
- Primary prevention (the earliest timing: keep it from starting):
- Secondary prevention (the middle timing: find it early):
- Tertiary prevention (the latest timing: manage what is already there):
Primary prevention acts the disease begins; secondary prevention finds it ; tertiary prevention acts someone already has it.
- A town has a rise in a mosquito-borne illness. Name one action and say which prevention level it fits.
- Why is a screening test (like checking blood pressure at a health fair) called secondary and not primary prevention?
- Sort these by level: a vaccine drive, an early-detection screening, and a rehab program for recovered patients.
A community has high rates of a tooth-decay problem from sugary water. Propose one intervention at each of the three prevention levels: primary, secondary, and tertiary: and explain the timing that puts each action at that level.