The design of public health interventions involves several steps: 1. Identify the problem: Use epidemiological data to pinpoint health issues. 2. Assess the population: Understand the demographics and needs of the target population. 3. Develop strategies: Create evidence-based strategies tailored to the specific health problem. 4. Implement the intervention: Execute the strategies in a methodical manner. 5. Evaluate outcomes: Monitor and assess the effectiveness of the intervention using statistical analysis and other methods.