The label also means you have seen through the lies.

The media hysterics whipped about about the 'notorious antivaxers' and what a threat they are. The medical regulators who orchestrate punishment and deregistration of doctors who are outspoken vax critics. The police who turn up at the offices of 'antivax' doctors, threaten the patients and staff, and steal all the files. The mysterious travel restrictions, and no-fly lists that the antivax doctors are on, and how police turn up to attack and shut down any venue in which they are giving presentations and talks.

It means you have recognized that the above measures are not merely one-off incidents in isolation from each other, but rather organized crime machinations aimed at the anti-vax movement by those who profit from the vax industry, and therefore that the anti-vax people are exalted above anyone else in their industry by continuing to be a healer when everyone else are poisoners, maimers, thieves and killers.

If the medical side of the antivax argumentation does not quite convince you, seeing the most evil people in the world line up as a pro-vax opposition in the political space should be more than enough.