Facebook has removed numerous accounts that were involved in anti-vax disinformation campaigns operated from Russia.
The company says that the network of these accounts targeted the US, India and Latin America.
They aimed to enroll influencers to spread false claims to undermine public confidence in particular Covid-19 vaccines, it added.
In the latest report on "coordinated inauthentic behaviour", Facebook said that they found some links between the network and a botched disinformation campaign from influencer marketing agency called Fazze - which is the part of a Russian-based company called AdNow.