The fact that multiple countries that had removed most restrictions seem to desperately be putting them back in place makes me think they’ve seen data that is making them very worried. This seems to fit the bill.
(1) Pseudo-linear? It's more like shifting the peak of a bell curve.
Far faster and more restrictive than ever before.
The UK, Netherlands, Germany are all imposing new restrictions when a few months ago they had removed most.
For whatever reason they think Omicron could be a huge problem.