Do you think it's a propaganda campaign, or maybe it's just a logical extension of longstanding talking points. What happened with Trump and the vaccine (he got booed for saying he got boosted) shows that the movement has outgrown even him, so it's basically self perpetuating.

Must be nice to live in your fictional alternative universe. First the massive propaganda, enforced by governments, media and tech companies is in favor of the vaccination. There is literally no mainstream media or government on earth I can think of that are pushing an anti-vaccine agenda. Secondly if the vaccine worked, it would have stopped the epidemic already. It didn't made a dent even in countries with 90% vaccinated. This single fact should one think. And think again. The "anti-vaxxers" are the scapegoats of political and health policies that don't work.