China has launched an app that allows people to check whether they have been at risk of catching the coronavirus.
The 'close contact detector' tells users if they have been near a person who has been confirmed or suspected of having the virus.
China has launched an app that allows people to check whether they have been at risk of catching the coronavirus.
The 'close contact detector' tells users if they have been near a person who has been confirmed or suspected of having the virus.
