In this April 3, 2013 photo, a worker pushes a cart as live pigeons are sold at a cage at a poultry wholesale market in Shanghai China. China announced a sixth death from the new bird flu H7N9 strain Friday, while authorities in Shanghai halted the sale of live fowl and slaughtered all poultry at a market where the virus was detected in pigeons being sold for meat. The first cases were announced Sunday. (AP Photo/Eugene Hoshiko)
China bird flu crisis
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.