As far as I understand it, the lockdown is to buy time only and to slow things down. Realistically, there is no vaccine in the mid term and an extended (months and months) lockdown simply not feasible due to societal and economic pressures.
When you think how few deaths locally there were before countries locked down and how depressingly slowly the mortality rates decrease, at what point do things open up where the health service can cope. Is that the strategy?