Until March 2021, coronavirus has caused 2.6 million deaths and 117 million confirmed cases globally. Vaccines are believed to be the game changer. Now, at least ten vaccines are in use around the world. The CoronaVac by Chinese vaccine maker Sinovac is among the front-runners. Sinovac’s vaccine has been approved emergency use in more than twenty countries and regions. And it plans to make one billion doses by this summer, how did they manage to do that? How effective is the vaccine? And how competitive are the vaccine programs around the world? To find out more, CGTN visited Sinovac’s newly built facilities in Southwest Beijing and interviewed its chairman & founder Yin Weidong.