China's top health authority confirmed that a family infected by H7N9 in Shanghai might involve human-to-human transmission of the new bird flu strain.
The body of a Fudan University medical student was sent for an autopsy on Wednesday to confirm the cause of his death.
An eight-strong international team of experts is expected to arrive in China this week to help with investigations and treatment of the H7N9 bird flu epidemic.
About 80 percent of respondents to a survey said they have changed their habits because of the deadly H7N9 bird flu outbreak.
Wildlife conservation plans in Guangzhou, Guangdong province, remain unaffected by the recent outbreak of the H7N9 bird flu virus in eastern and northern China.
Human infections with influenza-A H7 viruses, a virus group that normally circulates among birds, have been rare until now.
Both Beijing residents, a boy and a girl, who were infected with the H7N9 bird flu virus were discharged from Ditan Hospital on Wednesday.
Scientists have confirmed that an orchid found by a tourist in South China is a new species.
Traditional Chinese medicine (TCM) has been used in the treatment of 24 of the 77 H7N9 cases reported across China as of Wednesday.
The Health Bureau of East China's Zhejiang province on Wednesday reported four new cases of H7N9 bird flu, bringing the total number of confirmed H7N9 cases in the province to 25.
From 8 pm Tuesday to 5 pm Wednesday, China confirmed five new cases of human H7N9 avian influenza infection, including one in Shanghai and four in Zhejiang province.
The Chinese Ministry of Commerce will continue to tighten regulations concerning the country's hog slaughter industry this year, an official from the ministry said on Wednesday.