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Age distribution of rubella cases in China, 2004 to 2009. (a) Age specificity of rubella cases in mainland China from 2004 to 2009, as reported by NNDRS; (b) proportion of rubella incidences in different age groups from 2004 to 2009 in mainland China, as reported by NNDRS; (c) rubella incidences in different age groups from 2004 to 2009 in eastern (E), central (C), and western regions (W) of China, as reported by NNDRS.
