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. 2013 Aug 8;7(8):e2357. doi: 10.1371/journal.pntd.0002357

Figure 1. Proportion of symptomatic infections by year and infection number.

Figure 1

(A–G) Proportion of symptomatic infections in all, first, second, third and post-second infections by study year (2004–05 to 2010–11). * The proportion of symptomatic infections was not calculated when the total number of infections per group was ≤5.