A 29-year-old woman has become the 11th person to die from the virulent H5N1 strain of bird flu in China, state media have reported.
China reported its first human death from the virus late last year
The woman, identified only by her surname Li and described as a migrant to Shanghai, died in the city on Tuesday, the Xinhua news agency said.
It is the first known case in Shanghai, which has opened 160 monitoring stations at health clinics.
Booklets detailing preventative measures have also been handed out.
It is not known how the woman contracted the disease.
The city government has not said where she was from, or how long she had lived in Shanghai.
Bird flu has devastated poultry stocks and killed more than 100 people since late 2003, mostly in Asia.
Outbreaks have also recently been reported in Africa and Europe.
Almost all human infections so far are thought to have been caused by direct contact with sick poultry.
But scientists fear the virus could mutate to spread between humans, triggering a global pandemic.