Figure 4

Annual average number of symptomatic influenza cases. The left bar of each pair shows symptomatic influenza cases in scenario 1 where only TIV is used, the right bar of each pair represents those in scenario 2 where TIV immunisation of children 2 to 17 years old is replaced in 2012 by LAIV immunisation and where childhood vaccination coverage with LAIV is subsequently increased up to 50% in three annual steps. The lower parts of the bars correspond to the number of paediatric cases, the upper parts of the bars indicate the number of cases in adults aged 18 years and above.