[3] Although a small fraction of vaccine doses provoke serious adverse reactions, health professionals agree the benefits of being protected against a wide range of infectious diseases far outweigh the risks.

Timothy Caulfield estimates the proportion of Canadians who exhibit vaccine hesitancy between 20 and 30 percent, connecting the anti-vaccination movement to a rise in populism and a mistrust in expertise.

[14] Similarly to many anti-vaccination groups, Vaccine Choice Canada is opposing several measures instituted by public health authorities to limit the spread of the COVID-19 pandemic.

The lawsuit, filed in July 2020 by lawyer Rocco Galati with the Ontario Superior Court of Justice, alleges lockdowns, physical distancing and mandatory masking violate the constitutional rights of Canadians.

It also makes wider claims about a "New (Economic) World Order" and a "massive and concentrated push for mandatory vaccines of every human on the planet earth with concurrent electronic surveillance" at the behest of "global Billionaire, Corporate and Organizational Oligarchs", which refer to conspiracy theories widely shared on social media by a variety of fringe groups.

"[22][23][24][25] Also in early 2019, Vaccine Choice wrote to Facebook CEO Mark Zuckerberg to oppose upcoming changes that would make anti-vaccine messages less likely to be propagated by the social media platform, such as not sharing them as automatic recommendations.

While legal experts believe the court challenge is unlikely to be successful, President of the Ontario Medical Association Sohail Gandhi is concerned the increased visibility gained by the group may result in more disinformation about vaccines being disseminated to the public.