GoFundMe is the latest internet platform to crack down on the anti-vaxxer movement.
"Campaigns raising money to promote misinformation about vaccines violate GoFundMe's terms of service and will be removed from the platform," the company said in a Friday statement.
"We are conducting a thorough review and removing any campaigns currently on the platform," GoFundMe added. "These types of campaigns are extremely rare."
So far, the crowfunding platform has shut down fewer than 10 campaigns. But according to The Daily Beast, which was first to report the news, GoFundMe helped anti-vaxxer groups raise at least $170,000 in the last four years.
One anti-vaccination activist, Larry Cook, was using the platform to try and raise $100,000 so that he could continue to write and post videos about opposing vaccinations. His fundraising campaign generated over $56,000 before it went offline, according to an archived page. (His own website also says donations to him may go to pay his "personal bills.")
The GoFundMe crackdown comes as Facebook and YouTube have also been working to suppress anti-vaccination content. Last month, US Rep. Adam Schiff sent letters to both companies about "misinformation" from the anti-vaxxer movement circulating on their platforms, and urged them to act.
In response, Facebook and YouTube have been preventing the controversial information from appearing in their recommendation engines and in search. In addition, they plan to surface vaccination-related information from more authoritative sources.
Instagram, which is owned by Facebook, has also started blocking certain anti-vaccination hashtags. The blocked terms include #vaccinescauseautism, #vaccinesarepoison, and #vaccinescausesids. However, other hashtags such as #vaccineskill and #vaccinesharm remain searchable, although Instagrams says its effort to stop the controversial content will take place over several weeks.