As the video points out (7:50), 40% of conservatives were already saying they wouldn't get a hypothetical vaccine as early as May 2020, well before the election

As the video points out (7:50), 40% of conservatives were already saying they wouldn't get a hypothetical vaccine as early as May 2020, well before the election and before there was any certainty about effectiveness. Public health authorities have made a lot of bad mistakes in talking about vaccination but it seems to have only given people materials to build justification for their already-entrenched views.