Pandemics are an impossible scenario. Politicians are idiots to try and play God.

If it's novel and extremely contagious then medical knowledge lags by week's/months and you're helpless to stop it. If it's extremely lethal the medical system is a drop in the bucket towards mitigation and worthless to worry about.

If it's novel but not particularly contagious or deadly then there's no point in taking action as there's little benefit.

Neither scenario contains a useful shutdown.