China is making it harder to solve the mystery of how Covid-19 began

China has effectively snuffed out Covid-19, thanks to stringent border curbs, mass testing and a surveillance network that allows infected people and their contacts to be tracked via mobile phone

China has effectively snuffed out Covid-19, thanks to stringent border curbs, mass testing and a surveillance network that allows infected people and their contacts to be tracked via mobile phone https://ift.tt/2WUrvz0 December 30, 2020 at 05:04PM