Understanding seasonality is crucial for several reasons: 1. Public Health Planning: It aids in the timely allocation of resources, such as vaccines and medical supplies, to manage anticipated increases in disease cases. 2. Disease Surveillance: Seasonal patterns help in the identification of early warnings for potential outbreaks. 3. Preventive Measures: Knowing when a disease is most likely to occur allows for the implementation of targeted interventions, such as vaccination campaigns before the peak season.