of the coronavirus in recent weeks although health officials here still worry about potential new clusters. well from seoul south korea i'm now joined by professor john one son associate professor at the bob school of fleming university college london professor offer a peek at the beginning of march south korea has new infections very low you say besides the testing program that's due to surveillance how yes tracing through to surveillance technology played a pretty part in this fight against a corner. if the country has been to be complicity with testing if you don't know who to test the testing capacity has only limited the use so to find out who to test disobedience technology was really cool so the cool east to find though that everyone in every single one patient to come from the patient contacted in the past so ted way you can find out who this patient fighters from and who this patient could have been by just to what kind of data exactly has the government there gathered. because the initial data is the interview of people experts interview interview patients who too is king rarity in but then this entity just quote your work at all says to police state. resources overtaken through police and that's a credit card transaction