The WHO emergency use go-ahead for Sinopharm's COVID-19 vaccine expands the arsenal of COVAX global vaccine efforts. CGTN's reporter Feng Yilei talked to Shao Yiming, chief expert at the Chinese Center for Disease Control and Prevention, for more on delivering the vaccines to countries and regions in need.  

Dr. Shao is also a member of China's COVID-19 vaccine research and development task force. He also responds to skepticisms about the efficacy and safety of the Chinese vaccines.