I'm pretty curious about the possible motives as well, but there is some evidence it was happening even before 2020: https://www.cbsnews.com/news/anti-vax-move

I'm pretty curious about the possible motives as well, but there is some evidence it was happening even before 2020: https://www.cbsnews.com/news/anti-vax-movement-russian-trolls-fueled-anti-vaccination-debate-in-us-by-spreading-misinformation-twitter-study/ https://www.cbsnews.com/news/anti-vax-movement-russian-troll... (May 2019)