I think this article is a bit more nuanced based on what they are seeing on the ground. Derek brings up good points about background rates, but papers over some things. It's a complex picture and the below article paints it well.
Also scientists in Norway claim they found the mechanism that causes it.
https://www.sciencemag.org/news/2021/03/it-s-very-special-pi...
https://www.vg.no/nyheter/innenriks/i/KyGv2G/professor-says-...