Geographic Distribution of A(H7N9) in China by Onset Date
The onset date has not been publicly reported for all individuals infected with A(H7N9) from China. However, based on known onset dates, the distribution of cases indicates that Shanghai had the earliest cases in February, followed by additional cases in Shanghai in early March and scattered cases in Anhui and Zhejiang. By the middle of March, Jiangsu began having human infections which trailed off by early April. Shanghai continued having cases until about mid April.
In early April more infections started to occur in Zheijiang and may still be occurring. Cases with onset dates from mid April are now being reported from Fujian.
The onset date has not been publicly reported for all individuals infected with A(H7N9) from China. However, based on known onset dates, the distribution of cases indicates that Shanghai had the earliest cases in February, followed by additional cases in Shanghai in early March and scattered cases in Anhui and Zhejiang. By the middle of March, Jiangsu began having human infections which trailed off by early April. Shanghai continued having cases until about mid April.
In early April more infections started to occur in Zheijiang and may still be occurring. Cases with onset dates from mid April are now being reported from Fujian.
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