Health Systems and Population Health · USMLE Step 1

A country invests heavily in sanitation and clean water systems to reduce infectious diseases. What type of prevention is this?

  1. Primary prevention
  2. Secondary prevention
  3. Tertiary prevention
  4. Quaternary prevention
Show answer and explanation

Correct answer: Primary prevention

Clean water and sanitation prevent disease onset by removing exposure to pathogens.

Difficulty: Medium Question 13 of 20

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