This is an interesting article on why the anti-vaccination still gains traction.
https://aeon.co/essays/anti-vaccination-might-be-rational-but-is-it-reasonableA few good quotes:
"If two groups don’t agree on what the argument is about, then public debates become basically futile, no matter how many times you have them."
"In multiple surveys, Goldenberg found parents who were perfectly happy to believe that the MMR vaccine was generally safe, even as they decided they wouldn’t be vaccinating their kid. They worried about their own specific child’s sleep patterns, their child’s family medical history, their child’s recent illnesses – and they found, in those things, reasons why they didn’t believe the MMR vaccine was safe for their child.
‘The conflict isn’t about science,’ Goldenberg says. ‘It’s a conflict about much deeper values, and the science serves as placeholders for arguing out value disputes.’"
"Scientists try to fight with facts, assuming the public just doesn’t know what’s going on. When that doesn’t work, vaccine rejection gets attributed to people being ‘anti-science’. Meanwhile, the public gets angrier because it’s not being listened to. Vaccine hesitancy continues to rise because the public sees experts inundating them with numbers and refusing to answer the real questions."