A World Health Organization official said that Musk will have a huge influence over the spread of vaccine misinformation.

regulatory and shareholder approval are needed before Musk can buy the company. One of his aims is to promote free speech on the platform, and he looks set to relax the rules around moderation.

The WHO was asked if having Musk in charge of Twitter would affect its efforts to curb vaccine misinformation online.

When someone reaches a position in life where they have so much potential influence over the way information is shared with communities, they take on a huge responsibility and we wish Mr Musk luck with his endeavors.

Good information is life-saving in cases like this. It's even as life-saving, and in some cases more life-saving than having a vaccine in the sense that bad information sends you to some very, very bad places.

Ryan says that all social media platforms need to address misinformation.

Good stewardship of those platforms is very important. Ryan said it was not the business of WHO who owned or managed those platforms.

According to experts, the approach to free speech that he defined in a tweet as "that matches the law" could potentially inflame misinformation and hate speech on the platform.

In September 2020, Musk and his family wouldn't get the vaccine because he didn't think they were at risk. In December 2021, he revealed that he and his children had been vaccine free.

Musk questioned the legitimacy of coronaviruses testing in 2020 and railed against shelter-in-place orders.