Note a cultural memory component: in Finland (and Norway, Sweden) there was a rash of narcolepsy after the swine flu vaccinations of 2009-2010. Gov't was criticized for not reacting quickly enough (to be fair, side effect was not observed until vaccinations were ~complete, and so it was all just rearguard action after that). Lots of memory, bad press about kids being damaged. There is a cultural-political component here beyond the science.
https://www.cidrap.umn.edu/news-perspective/2012/03/studies-...