Anti-vaccine activism in Canada
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From its origins in the 19th century to the 2022 convoy protests, the Canadian anti-vaccination movement has been resisting public health efforts to promote vaccinations through mass demonstrations, political advocacy and judicial activism. It has been led by a succession of groups, with Vaccine Choice Canada being the most prominent as of 2025.
The Canadian anti-vaccination movement developed in parallel to its British and American equivalents in the late 19th and early 20th century, in response to legislation by provincial governments, municipalities and school boards attempting to check the spread of infectious diseases. The British anti-vaccination movement developed rapidly in the mid-19th century, with the Anti-vaccination League founded in response to the Vaccination Act of 1853. Anti-vaccination organizations founded in the United States between 1879 and 1885 were directly influenced by British activists such as William Tebb.[1] By the end of the 19th century, the British anti-vaccination movement had developed from a loose community of interest that included homeopaths, hydrotherapists and faith healers to an international network of associations.[2]: 251–3

Along with the development of inoculation, public health structures were starting to take shape in Canadian cities. Legislation allowing for the formation of temporary local public health boards to respond to epidemics was passed in Upper Canada in 1833; these boards were to operate continuously by 1849 and by 1886, some 400 health boards would be in operation in what is now Ontario. A provincial board of health created in 1882 normally played only an advisory role, but ordered school closures and suspended stagecoaches when called upon to manage a smallpox epidemic in Eastern Ontario in 1884.[3] Toronto appointed William Canniff as its first Medical Officer of Health in 1883.[4][5][6]
First Anti-vaccination League and the 1875 riot

Montreal started appointing medical officers of health in 1870. The population of what was then Canada's largest city was demanding better sanitation in the rapidly-expanding industrial centre. There was, however, significant unease with vaccination, especially in the francophone neighborhoods and the surrounding villages. Doctors who opposed vaccination had exerted a significant influence, contributing to low rates of inoculation. Those included Alexander Milton Ross, who maintained correspondence with British anti-vaccination activists. His French Canadian counterpart was Joseph Emery Coderre, a co-founder of the Montreal Medical Society. Coderre organized debates between the city's medical doctors, presenting evidence that, to his mind, showed smallpox vaccination was both ineffective and harmful.[3][2]: 251–3
Coderre established Canada's first Anti-vaccination league in 1872, recruiting primarily among physicians, but also aldermen and lawyers. He argued some 2,000 physicians were anti-vaccinationists, but was unable to make his point of view prevail among his colleagues of the Society, which continued to support a free and voluntary vaccinations program managed by Medical Health Officer Alphonse Barnabé LaRocque. Montreal's mayor, William Hingston, strongly supported vaccination and chaired the city's Health Committee. When the municipal council debated a by-law permitting compulsory vaccination on August 9, 1875, a crowd led by lawyer Henri St. Pierre and other leaders of the league threw stones and injured two council members, then damaged LaRocque's home. The proposed by-law was dropped.[7]: 211–212 [2]: 251–3
In 1876, LaRocque attributed reluctance encountered among the city's French-speaking working-class to the League's influence, despite being the very population that was more vulnerable to infectious diseases, living in close quarters among the factories and slaughterhouses of the lower town. In addition to exaggerating the incidence and severity of adverse reaction to the vaccine, Coderre's League equated vaccination with British imperialism, thus tapping into existing linguistic tensions.[7]: 214–220
1885 Montreal smallpox epidemic

Historian Michael Bliss argues the anti-vaccination movement found favourable conditions in Montreal in 1885: impressive side effects to the vaccine from faulty vaccination procedures early in the epidemic, language tensions exacerbated by the trial and execution of Louis Riel, economic disparities between anglophone and francophone neighbourhoods, and a timid early response from civil authorities.[2]: 254
Smallpox probably arrived in Montreal in January 1885 with one or several train conductors and was allowed to spread through the urban population through poor containment and a disorganized public health response. In addition to normal side effects, an initial batch of vaccines was contaminated during manufacture and caused cases of skin infections; this provoked a three-months cessation of the campaign at a critical stage and a hardening of public opinion. By the end of the Summer, there might have been as many as 4,000 cases in Montreal, with the epidemic spreading to other population centers.[8] The Catholic clergy, already singing the praises of vaccination from the pulpit, agreed to visit people identified by the Health Board as having refused vaccination to enlist their cooperation.[2]: 199–200
The Canadian Anti-Compulsory Vaccination League was founded at that time by Ross, Coderre and several physicians involved in his first League, as well as businessman W.T. Costigan and Dean of McGill Law School William Kerr. The new league also counted several high-profile anti-vaccinators from abroad, most notably William Tebb and the American Robert Gunn.[2]: 307 [7]: 182 That second league's objections to smallpox vaccination centred on three claims: that the vaccines were ineffective, arguing it failed to prevent smallpox; that they caused other diseases such as tuberculosis; and that they infringed upon the rights of citizens.[4]

On September 28, 1885, tensions between health authorities trying to impose vaccination and a hardening opposition reached new heights. About one thousand French Canadians gathered in a mass protest that became a riot. Kept on the move by successive police interventions, they shattered the windows of the Health Board on Sainte Catherine Street before turning on several drugstores selling vaccines. They then attacked what they believed to be the houses of two members of the health board (damaging one belonging to someone with the same name). Later that night, the crowd stormed the section of City Hall that housed the Health Board office; when they had to retreat before a police charge, they made their way to the Montreal Herald, where the printers continued to prepare the morning edition as the windows were shattered by stones. The Chief of Police Hercule Paradis was stabbed during an attack on the central police station. In the aftermath, Mayor Honoré Beaugrand armed the health inspectors and asked the militia to support civil authorities.[2]: 208–214 [8]
Montreal wasn't the only city to experience anti-vaccination riots in 1885: in the United Kingdom, civil disturbances of a much greater scale were taking place in Leicester. Canadian anti-vaccination activists were exchanging correspondence with their British and American counterparts, with articles from London reprinted in newsletters in Montreal. Coderre was a member of the Ligue internationale des anti-vaccinateurs, giving him access to a pan-European network of influencers.[1][9][10]

While violence didn't occur again in 1885, the public opinion battles continued. With newspapers refusing to print his advertisements or to cover his speeches, Ross published on September 30 the first of a series of four-page pamphlet called The Anti-Vaccinator and Advocate of Cleanliness [2]: 219 , the Canadian scion of a long-running British anti-vaccination journal. Coderre published his own Anti-Vaccinateur.[1] The League also provided legal assistance to some of the 200 citizens charged with violating the health by-laws. McGill's Dean of Law William Hastings Kerr provided legal advice to the League.[7]: 235–254
The epidemic continued to rage through the Fall of 1885, claiming some 50 dead per day, before being defeated by the now compulsory vaccination campaign. Montreal lost 3,164 people to smallpox in 1885, amounting to 1.89% of its population. Some 91% of the dead were francophones and 66% were younger than five years old. In the whole province of Quebec, the epidemic killed 5,864 people in 1885 and the first months of 1886.[2]: 303–304 The adjacent province of Ontario was largely spared, with only 30 deaths from the disease: its provincial board of health (an organization that found no equivalent in Quebec) acted early to inspect train passengers coming from Montreal, who had to show either documentation proving vaccination or a recent vaccination scar.[6]
Aftermath
Despite the high death toll due to vaccine hesitancy and initial disorganization, the 1885 Montreal smallpox epidemic provided a proof of concept for the effectiveness of vaccination in conjunction with public health measures (such as monitoring and isolation of cases).[2]: 238 The first permanent Quebec health board was created in 1886 on the heels of the epidemic. However, vaccination rates remained low in the province, leaving the population vulnerable to more fatal outbreaks in 1891 and in 1897-1898.[2]: 308 The anti-vaccination movement remained a contributing factor in what is today called vaccine hesitancy for the next 30 years, especially in Quebec where it could use rhetoric that drew upon inequalities inflicted upon French Canadians.[7]: 274–276
The League remained active into 1886, unsuccessfully attempting to defeat pro-vaccination candidates in the 1886 municipal election and opposing the adoption of a provincial vaccination bill. Ross would leave Montreal and form the Toronto Anti-compulsory vaccination League in 1888, as the city's medical health officer imposed school vaccination for schoolchildren. With Ross' departure and Coderre's death in 1888, the Montreal league faded away.[7]: 264–273
In response to the epidemic, the adjacent province of Ontario passed the 1887 Vaccination Act (An Act respecting Vaccination and Inoculation), mandating smallpox vaccination for infants. The legislation also allowed municipalities and school boards to adopt their own mandates. The Toronto Board of Education used this new public health power to mandate smallpox vaccination for attendance to its schools in 1894. The new measures were the object of lasting public debate and garnered considerable news coverage. Legislation from this period was weak compared to the vaccination acts protecting the British public and enforcement in the face of organized opposition remained a constant problem. As a result, childhood vaccination rates remained low through to the end of the century.[11]



