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Table 1 Model parameters varied in the fitting and simulation procedures to cover their uncertainty and the values varied for each parameter

From: Investigating the pertussis resurgence in England and Wales, and options for future control

Parameter Values varied
Average duration of natural immunity (ω) 10, 15, 20, 25, 30, 35, 40, 45 and 50 years
Scale parameter for the proportion of second + infections that are notified compared to proportion of first infections in unvaccinated individuals (α2/α1) 10 % (1/10), 5 % (1/20), 3.3 % (1/30), 2.5 % (1/40) and 2 % (1/50)
Degree of wP and aP vaccine protection against infection (πwp and πap) 10, 20, 30, 40, 50, 60, 70, 80 and 90 %
Average duration of wP and aP vaccine protection against infection and disease (wPω and aPω) 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5 and 30 years