Xiao Meng, assistant director from Peking Union Medical College Hospital, has been fighting the novel coronavirus in Wuhan. Xiao talked about the importance of the lockdown in Wuhan in a live show called COVID-19 Frontline. "Together works out the strategy against the virus," said Xiao. "The basic rule of a lockdown is controlling infected patients and the infection source, as well as cutting the transmission roots,”Xiao answered Professor Shabir A.Madhi at the University of the Witwatersrand, Johannesburg, South Africa.