Anecdotally, it seems to have gotten worse, I know STEM grads who I'd never think of being anti-science announcing they are "vaccine hesitant". We speak about it behind their backs but really no one even tries to discuss this with them.
I know this is a false equivalence argument but one might frame vaccine hesitancy as simply people unwilling to be mandated to inject anything into their bodies. Can you imagine if the government sought to mandate heroine injection as the only standard way of pain relief? That's what I think most average people think about when they are "vaccine hesitant".