Of course there is such a thing as anti vax - they are people who are anti vaccination programmes put in place by their governments.No such thing as anti vax, is anti loss of freedom.
Most just don't get the worldwide ramifications of all this jab anything that moves
there are many people who don't bring their children to get any vaccinations based on their extensive research on the internet, and they will gladly tell you they are anti vaccinations.
you may not be anti vax, and see the vaccination program as an infringement of your civil liberties, but hey you don't speak for the rest of the world.