Delta drives China's worst outbreak since Wuhan: How the Covid variant spread

China is battling its worst outbreak in months fuelled by the Delta variant. The outbreak has forced China to place many compounds in lockdown in the capital Beijing. Over 41,000 are under stay-at-home orders in Beijing's Changping district. Checkpoints have been set up to regulate the entry and exit of residents and public transport suspended. According to the state media, this is the worst surge in China since Wuhan in December 2019. The new surge of Covid-19 cases in China started from an airport in Nanjing. The cluster of infections in Nanjing is linked to airport workers who cleaned a flight. The flight had arrived from Russia & nine workers tested positive on July 20. Watch the full video for more.