[grey-area]

How long for and does this include workers too or just tourists?

This isn’t really tenable if you want a functioning economy, and cases will slip through.

[threeseed]

It's indefinite and it applies to everyone.

And it seems a pretty common sense preventative measure since a 14 day quarantine isn't too onerous.

[grey-area]

It’s a sensible measure to delay the spread, I don’t believe it will be effective in stopping the spread and it will be very damaging to the economy so not sustainable IMO.