Figure 5From: 4Flu - an individual based simulation tool to study the effects of quadrivalent vaccination on seasonal influenza in Germany Probability of extreme influenza years. (a) Risk that the number of Influenza B infections per year in Germany exceeds the threshold given on the horizontal axis (solid line: TIV vaccination; dashed line: QIV vaccination). (b) Relative reduction in the risk of exceeding the threshold if QIV is used instead of TIV. Evaluation of 400,000 simulation years (10,000 simulations of 20Â years for TIV and for QIV).Back to article page