China bird flu crisis

Associated Press
A worker carries a cage to catch pigeons at the People's Square as a precautionary measure against bird flu in Shanghai on Saturday April 6, 2013. Shanghai has reported two more cases of human infection of a new strain of bird flu, raising the number of cases in eastern China to 20. Six of the people who contracted the virus have died. (AP Photo) CHINA OUT

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The H7N9 flu has infected 108 people in China since it was first detected in March, according to the World Health Organization. The new strain of avian flu has killed 22 people among  confirmed cases.

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