The comments were made despite clear reassurance from health professionals about the safety of vaccines.
Various harmful anti-vax claims have been debunked and are being monitored by social media firms, with a view to being removed.
Facebook says that since January 2020, it has been removing content such as conspiracies about false cures and treatments.
In October, it banned advertisements that discouraged people from taking vaccines.
Vaccinations are vital to protect ourselves and children against ill health and the spread of preventable diseases.
In the UK, 8,977,329 people have now received their first jab against coronavirus.
So far, none of the vaccine trials have reported any serious safety concerns.