“A business as usual” stance or strategy is not just a historical mistake but is already an unlikely event.
Comparisons sometimes made with previous crises are inherently misleading. The exogenous shock of the virus impacts all member states to differing extents. A new action plan sui generis is needed, in order if only to counter the impression of ordinary citizens that when push comes to shove, only their own nation can act quickly and boldly enough to deserve their trust.
The first weeks of the crisis have seen a scenario in which governments (not just European ones) are acting individually, separately and alone, whilst the EU has been almost entirely absent from the scene.