Herd immunity requires something like 60% of the population to have effective antibodies; even in Stockholm the incidence in the population is well under 10%. Besides, looks like immunity from having had the virus wears off within a few months. Herd immunity doesn’t seem achievable - looks like it’s vaccine or bust.
I’m flying to Sweden next week Wednesday, I’ll keep an eye out for Swedes looking at me like I’m an idiot! 