HANGZHOU - Chinese researchers announced Saturday they had successfully developed the vaccine for the H7N9 bird flu virus, after the flu strain had left more than 130 people infected, with 45 fatalities reported.

Shu Yuelong, director of the Chinese National Influenza Center, said this is the first influenza vaccine ever developed by Chinese scientists.

The vaccine has provided important technical support to battle the new flu strain, making contribution to the H7N9 flu virus epidemic control all over the world, said Shu, also director of the WHO Collaborating Center for Reference and Research on Influenza.

The vaccine was jointly developed by the First Affiliated Hospital under the School of Medicine of the Zhejiang University, Hong Kong University, Chinese Center for Disease Control and Prevention, National Institute for Food and Drug Control, and the Chinese Academy of Medical Sciences.

China reported the world's first human case for H7N9 bird flu infection in March. As of Friday, a total of 136 people were confirmed to have been infected with the virus, according to the National Health and Family Planning Commission. Of the infected, 45 died, representing a fatality rate of 33.1 percent.