Epidemic prevention workers disinfect a live poultry market in Langfang, north China's Hebei Province, July 23, 2013. Live poultry markets in Langfang were all closed from July 21 as a 61-year-old woman from the city has been confirmed positive of the deadly H7N9 bird flu strain, who often bought vegetables from a local farm product market near her home where live poultry are sold. [Photo/Xinhua]