[cf9]

You know what's the real problem? It's that no one knows how long the lockdown has to be maintained in order to be zero case. You guess 1 to 2 months but are you certain it's just that?

If it's just 1 to 2 months then Singapore can live with it. After that how? Open up and you start to have cases, then lockdown again?

No need. Last time unable to test,  Now can,  get 1st test , after 14th days go for another round. results need send back to hospital to check. plus 2 weeks 99%  wipe. 

 For travelling in after than incoming isolated 3weeks can proceed but take 1 more art test at 28th day.  Those countries last 3 weeks lesser than 100 can shorter to 12 days, but 21st day need take another test. If country they come from zero for 3 weeks. after 1st test 5th day can proceed.
Country 1 whole month zero , after test result can proceed. Can change to cities instead of countries to be more exact.