In this April 9, 2013 photo, a child wears a mask near 

In this April 9, 2013 photo, a child wears a mask near the closed poultry section at the Huhuai agricultural market where the H7N9 bird flu was detected by authority in Shanghai, China. After a new and lethal strain of bird flu emerged in Shanghai two weeks ago, the government of China's bustling financial capital responded with live updates on a Twitter-like microblog. It's a starkly different approach than a decade ago, when Chinese officials silenced reporting as a deadly pneumonia later known as SARS killed dozens in the south. (AP Photo/Eugene Hoshiko)
Associated Press
In this April 9, 2013 photo, a child wears a mask near the closed poultry section at the Huhuai agricultural market where the H7N9 bird flu was detected by authority in Shanghai, China. After a new and lethal strain of bird flu emerged in Shanghai two weeks ago, the government of China's bustling financial capital responded with live updates on a Twitter-like microblog. It's a starkly different approach than a decade ago, when Chinese officials silenced reporting as a deadly pneumonia later known as SARS killed dozens in the south. (AP Photo/Eugene Hoshiko)
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