Actually, Russia has been heavily seeding the United States and Western Europe with disinformation about vaccines through fake social media accounts, among other mediums, almost as soon as it became public knowledge that the vaccines were in development. Part of a broad state-run campaign to destabilize the target nations, sow mass dissent, overload healthcare systems, etc.
These disinformation campaigns, along with recently publicly confirmed cyber warfare attacks on energy sectors of various countries including the US, Putin has been quietly waging a digital war on the West for years, now. A not so secret secret.
And it has worked quite well, so far. In the US in particular, Russian intelligence saw a polarized nation that already habitually latched onto factless unsupportable narratives spun up by political talking heads and propagandist websites. We were, and are, ripe for manipulation.
Amazes me that people don’t realize that their vaccine fears, and certain political positions on both sides, originated in a room full of Russian intelligence operatives. Talk about sheep.