BEIJING, May 26 (Xinhuanet) -- China's Ministry of Health on Thursday confirmed that no human infection case of avian influenza has been reported in northwest China's Qinghai Province, where migratory birds were killed by the deadly H5N1 strain of the bird flu virus.

    The ministry has sent a expert team to Quanji Township of Gangca County soon after the bird flu outbreak in an effort to have on-the-spot checkup and supervise the prevention and control work for possible human infection.

    As of May 25, neither human infection case or pneumonia case with unexplainable cause, or human flu case related to the contacts with the dead birds, has been reported, said the ministry.

    The local health authorities have stepped up infectious diseasecontrol and prevention endeavor by closely monitoring and screening all pneumonia and flu-like cases among human beings, fowls and livestock.

    China's Ministry of Agriculture confirmed the outbreak of bird flu last Saturday. It was the first report of H5N1 virus detected in China since the country successfully brought 50 cases of bird flu under control last year.

    On Wednesday, Chinese scientists announced that two new vaccines have been developed to effectively curb the spread of the deadly H5N1 virus to fowl, water birds, mammals or humans. Enditem