YouTube will ban contradicting WHO's recommendations about vaccination.

Anti-vax fantasies, when presented as fact, threaten people's lives. It is useful to do something to weaken the conspiracies that make and spread them. However, censorship is dangerous too.

It would be better to avoid promoting such material when people don't explicitly ask for it. For instance, to label each one with "anti-vax", and not recommend anything with that label, nor find it in searches unless "anti-vax" is one of the search terms.