1/Do we need to screen for Corona virus? How do we screen for Corona among high risk groups? - 2/ Can technology (Apps etc...) help us in predicating the threat of highly contagious infections? searc

1/Do we need to screen for Corona virus? How do we screen for Corona among high risk groups?

- 2/ Can technology (Apps etc...) help us in predicating the threat of highly contagious infections? search for examples 

- 3/ Mention 2 rapid kits used to diagnose the case of Corona virus and explain their principle and limitation

i need 500 word for every question