Mean age-specific outcomes^* in terms of costs and QALYs. Absolute differences between current situation and the situation with adolescent pertussis booster vaccination over the 25 year period for a population of 150,000 people.

Negative numbers indicate an increase in costs or a decrease in QALYs as a result of adolescent vaccination. *Due to the extensive running time of the model―related to the high complexity―only 20 runs per scenario were performed. Rn = loss of immunity after natural infection.