Translational Research And Population Health Management

I need these questions answered in 200 words each. Please provide in-text citations and each question with separate references, which must be within the last 3 – 5 years.
  
1. How does epidemiology helps in researching and addressing population health challenges? Provide a specific contemporary example.
2. Research a health concern that impacts a population with which you are familiar. How do biostatistics affect the research focus? How do you define the population as your patient? Make sure to include the population and health concern.