Folks, this anonymous person - who is pretending to be a different anonymous person - is still stumbling around in two year old information from the dawn of the distribution of covid vaccines: https://unherd.com/thepost/the-most-vaccine-hesitant-education-group-of-all-phds/. Check the date.

For something more current (that is, after over 13 billion doses of the vaccine have been delivered), have a look at https://www.sciencedirect.com/science/article/pii/S0167629623000796, which says "We find a strong positive association between cognitive ability and swift vaccination"