We do not need to look further than excess mortality during the period. It's three years later now and the numbers are in. There is plenty of high quality data

We do not need to look further than excess mortality during the period. It's three years later now and the numbers are in. There is plenty of high quality data from all Western countries. However data driven policy decisions should be much more fine grained than that. We should instead identify specific situations where different type of lockdowns would make sense. But the data is clear. Prolonged periods looks bad, at closing schools were clearly the wrong decision on every time scale.