China's novel coronavirus pneumonia has been proved effective in clinical trials at this stage, Swaminathan, chief scientist of the World Health Organization, said at a regular news conference on the new crown pneumonia. Who chief scientist summa Swaminathan: China's new crown vaccine research and development project is very active. Several candidate vaccines are in the leading (Advanced) stage of clinical trials. Who is very interested in China's new crown vaccine and has been paying close attention to it. Some vaccines have been proved effective in clinical trials at this stage.
