Incidence and Prevalence

• Incidence is the number of cases developed during a specific time period
• Prevalence is the number of cases in the population (new and existing) during a specific time period
• Prevalence is used in the calculation of DALYs to measure the current impact
• The first example calculates YLD using prevalence.
• The second example simulates incidence and prevalence using Poisson distributions to simulate the new cases and recovery