I'm only looking at some tables and charts so this is hardly rigorous, but there does seem to be a correlation between the various social trust indexes and vaccination rates among highly developed countries.
It makes intuitive sense. Social cohesion requires trusting democratic institutions but that trust is currently at an all time low thanks in no small part of talking heads on platforms like Twitter and Facebook. With every ideologue pushing their own agenda and doing their best to reduce trust in democratic institutions it's not surprising that most people no longer hold any collectively coherent beliefs.