a covid outbreak first discovered in the chinese city of nanjing has spread to eight provinces and beijing. state media say it s the most extensive outbreak since wuhan. almost 200 people have been infected since the virus was first detected at the city s busy airport on 20 july. all flights from nanjing airport will be suspended for the next two weeks. well, earlier i spoke to dr xi chen about what exactly is happening in nanjing and how china can get the virus under control. well, iam nowjoined by associate professor of public health at yale university and nanjing native dr xi chen to discuss how china tackles this fresh crisis. overall, china has so far managed to keep the virus largely under control, as we know, by closing the borders and moving quickly to stamp out local outbreaks but this time, nanjing authorities were slow in their identification of the virus and it was transmitted from an air flight from russia through air china airflight to nanjing onjuly ten but after ten d