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12 April 2013 Update - Human Infection with Avian Influenza A(H7N9) Virus in China

As of April 12, 2013 (18:00 Beijing Time), additional five cases of human infection with influenza A(H7N9) virus were laboratory confirmed (17:00 April 11-18:00 April 12 Beijing Time). Two cases are from Shanghai, and the other three from Zhejiang.

To date, a total of 43 cases have been laboratory confirmed with influenza A(H7N9) virus in mainland China, including eleven deaths. These cases are distributed over 23 prefectures/districts of 4 provinces, including Shanghai (20 cases, 7 deaths), Jiangsu (12 cases, 1 death), Anhui (2 cases, 1 death) and Zhejiang (9 cases, 2 deaths).

At this time no epidemiological link between the human cases was identified. All close contacts are being closely monitored with medical observation, and no confirmed infection with A(H7N9) virus were found in the contacts. So far, all confirmed human infections with A(H7N9) are sporadic cases, and there is no evidence of ongoing human-to-human transmission.

Chinese Center for Disease Control and Prevention(China CDC)

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