there's something to this but it's not the whole story imo. a) measles has been eradicated for decades but antivax sentiment has accelerated only recently, b) Covid just killed like a million people and still many turned against a highly effective vaccine https://gidmk.substack.com/p/the-problem-with-vaccines?utm_source=share&utm_medium=android&r=7j5z5&triedRedirect=true
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Now add to that social media and the proliferation of anti-vaxx groups online...