"Denialism" runs the gamut from your undecided aunt who read a Facebook post and can be talked around in five minutes, through to actual strong opposition to va

"Denialism" runs the gamut from your undecided aunt who read a Facebook post and can be talked around in five minutes, through to actual strong opposition to vaccines based on years of conspiracy theories, and absolutely none of the people on that gamut respond well to unsourced claims that a vaccine is safe. If you want to feel smug and superior, make dogmatic statements. If you want to change opinions, then you have to treat denialists with respect for their humanity, and separate the person from the opinion.