Outside of social media, iirc, there was footage of certain political figures such as then Gov. Cuomo publicly rejecting the vaccine deployment in his state, during Trump's administration. Since people relied on social media more often than cable TV, I suppose there were lots of amplified "lost in translation" moments.

A simple keyword search of "Trump vaccine" on reddit yields massive cognitive dissonance and a sociopath would conflate their bias from all the subreddits the keywords are found.