Twitter, like other social media companies, is contending with vaccine misinformation as Covid-19 inoculations roll out. | Olivier Douliery/AFP via Getty Images

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.

On Monday, Twitter said that posts deemed to be harmful misinformation will be subject to labels directing people to content curated by Twitter, public health resources, or the company’s rules. At the same time, users who continue to post such tweets will be subject to a strike policy. If a user posts too much vaccine misinformation and