I should point out that there is a very significant negative connotation to the term "anti-vaxxer", because of the last two decades of kids, autism, measles outbreaks, etc.
However there is a completely different version of anti-vaxxer that exists. These are people who think that kids should have all these vaccines, but never get any vaccines themselves. Flu vaccine? Nope. 10-year tetanus booster? Nope. COVID vaccine? Nope.
They're not anti-vaccine, they just will always find a rationalization for why THEY don't need one. They totally support other people getting them though!