It's a myth that Scandinavian countries are uniform, say, in flu mortality. See table in link. It's in Hebrew but you can see how flu mortality varies there. For example, in 2017-2018, flu mortality in Denmark was 5 times that of Sweden (488 vs 101). https://www.zman.co.il/121962/

See also Denmark-Sweden here.

https://twitter.com/prof_shahar/status/1350433965283266564