Visit the March Against Monsanto website and you'll see a strange ad peppering the pages, among the usual dubious stories about the evils of Monsanto, GMOs, pesticides and so on. It's an advert for a "docu-series" called Vaccines Revealed, claiming that it is "Exposing the biggest public health experiment... ever!".

Click through and you'll be confronted with typical anti-vaccine conspiracist propaganda, alleging sinister corporate "experiments," huge damage done to so-called "vaccine injured" people, and entreaties not to go around "blindly jabbing lab made cocktails into our bodies." This ad is no accident — March Against Monsanto now carries explicitly anti-vaccine stories on its site.