A woman who died in eastern China earlier this month was infected with H5N6 bird flu, Chinese officials confirmed on Thursday, while a UN agency called for urgent action to stop the spread of avian influenza in the Asia-Pacific region. The latest case, a 70-year-old woman from Hefei in Anhui Province, visited a live poultry market before she developed symptoms on June 17. She was admitted to hospital two days later and died on July 8. The Chinese government often takes weeks or months to report human cases of bird flu. “It is certainly possible that there are cases that are either not being de…