Could I ask where you're getting the data that they've achieved herd immunity in Sweeden?

I'm not for a second claiming this is an authoratitive source, but I am highlighting that this source paints a very different picture of the outcomes in Sweeden: https://medicalxpress.com/news/2020-08-covid-herd-immunity-sweden-materialize.html

I think the final paragraph is pretty important in the link above:
"The authors do say, however, that only once the pandemic and impact of measures taken are fully understood, after one or two years at least, can we begin fairly then to judge what was done correctly."