http://www.articleheaven.net en-us editorial@articlealley.com As the United Nations specialized agency for health issues, the World Health Organization in combating cross-border spread bird flu to play an important role. So WHO is facing in this area which important tasks and challenges? The International Pledging C... http://www.articleheaven.net/who-directorgeneral-china-has-made-great-efforts-to-prevent-and-control-bird-flu-1598469.html 14th June 2010