Increasing incidence of pertussis before scheduled primary school booster vaccinations in Norway, 1998–2019

Key Points

• Significant reduction in the burden of pertussis can occur with earlier booster vaccinations in primary school students.
• Pertussis incidence increased notably prior to the scheduled school booster vaccination.
• Observational analysis highlights the effectiveness of adjusting vaccine timing for better protection.
• This finding indicates that timely interventions could greatly improve public health outcomes.