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Sex-specific distribution of scarlet fever cases by age in China, 2004–16
(A) Age and sex distribution of the number of cases of scarlet fever over the entire study period. The boxes represent the 50% of cases distribution and the lines indicate the IQR. (B) The annualised average incidence, by patient age group and sex. The scale for those aged 15 years and older is from 0–1 because the average incidence is so low.
