1. Describe the transmission of pertussis (whooping cough) in the context of the Agent-Host-Environment triangle. (Max:150 words)
2. Describe he golbal epidemiology of pertussis, and identify the most important changes in disease burden observed in the past 2-3 decades in developed countries/regions. (Max: 200 words)
3. Provide an ecidence-based explanation for the observed patterns of pertussis decribed above (you can choose one country/ region as an examle to illustrate), and propose potential interventions to control the disease in response to the chnages in disease pattern. (Max: 400 words)
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