I've never heard of Humphries before your comment. I searched and found a long video of Humphries where she says, at the outset:
>> "never has there been a safe vaccine, never will there be a safe vaccine, and it is not possible to have a safe vaccine." [1]
IMO, a reasonable person would call that an anti-vaccine point of view, don't you think? Calling it pro-vaccine-safety seems disingenuous.
Anyways, I agree with you that she seems well read and she articulates her position in a level-headed manner and I'm even open to her being correct. But her position seems to be very anti-vaccine because she tells us that vaccine safety is "not possible" and that there will never be a safe vaccine.