Autism Alliance of Canada steadfastly believes that words, and facts, matter. That is why we champion conversations about autism that are rooted in high-quality evidence, reflect accuracy, and honor the dignity of every individual.

At a time when public discourse in the United States is generating concerns and questions here at home, it is more important than ever to inform Canadians on what science shows, and to reaffirm our national priorities. 

Autism is a lifelong neurodevelopmental condition. Research has established that autism arises from complex interactions among genetic, biological, and environmental factors. There is no single “cause” of autism, and framing autism in terms of epidemics or preventable diseases undermines both scientific integrity and the dignity of autistic people.

Decades of high quality research have shown no link between vaccines and autism. Current evidence also does not support claims that acetaminophen (Tylenol) use in pregnancy causes autism. While some studies suggest possible associations, larger and more rigorous research, including population-based sibling studies, show no causal link. Medical organizations in Canada and internationally continue to recommend acetaminophen as safe when medically necessary during pregnancy. 

Research into Leucovorin (folinic acid) as a potential supportive intervention for some autistic people is still emerging. Current evidence is limited by small sample sizes and much more research is needed before it can be considered a standard treatment or support. As of now, no medical body recommends it as standard care. 

Scientific inquiry is important but cannot overshadow what matters most: ensuring that autistic people and their families have the supports, services, opportunities they need to thrive. 

Canada’s Autism Strategy provides a framework for advancing equity, inclusion, and access to care across the lifespan. This means:

• Expanding timely and equitable access to supports and services.
• Upholding the rights and dignity of autistic people.
• Ensuring that policy decisions are grounded in rigorous, transparent evidence.
• Partnering directly with autistic people, families, researchers, and service providers to shape solutions that reflect lived experience.

Public conversations about autism must be rooted in respect, accuracy, and inclusion. Stigmatizing language or over-simplified claims about “causes” distract from the urgent work of building a Canada where autistic people can flourish in their schools, workplaces, and communities.

Autism Alliance of Canada calls on policymakers, researchers, and the public to resist  and counter misinformation, directly challenge stigma, and remain focused on what matters most: creating systems of support that honour autistic people as valued members of our society.