https://www.vox.com/recode/2021/3/1/22307518/twitter-misinformation-vaccine-strikes-labels-covid-19

The company is introducing a new strike system that could lead to some users getting permanently banned.

Like other social media companies, Twitter has banned harmful misinformation about the Covid-19 vaccines out of concern that it could make people more hesitant to get inoculated. Now, the social media platform is adding more layers to its approach.