They don't refuse vaccines because they are 'experimental'[1] (They are happy to demand vitamin C, or ivermectin, etc, etc, etc.), they refuse them because it's the position their political tribe has adopted.
[1] They've gone through all the same human trials as any other vaccine - it's just that they went through those trials at the same time, as opposed to one-after-the-other.
That being said, I still think it's the right move to take the vaccine because the statistics show that it is effective.
Pretty sure it haven't been approved for covid in 1980
No, there aren't, unless you torture the definitions to the point of uselessness, or unless your personal experience means that you personally know 50 liberals and 5 conservatives (and 6 unvaccinated people, split evenly between the two). [1]
Or, if you have to use your eyes to believe it, look at any vaccination rate map [2], and contrast it to how those states vote.
[1] https://www.brookings.edu/blog/fixgov/2021/10/01/for-covid-1...
[2] https://www.mayoclinic.org/coronavirus-covid-19/vaccine-trac...
Why must there be a single attributable factor? It seems likely that there are multiple. Party allegiance certainly appears to be one of these from numerous polls and analyses [1]. Poverty and insurance status is likely another [2].
[1]: https://www.kff.org/coronavirus-covid-19/poll-finding/import...
[2]: https://www.kff.org/coronavirus-covid-19/issue-brief/vaccina...