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Dr. Joss Reimer, recently appointed as Canada’s chief public health officer, has identified combating health misinformation and rebuilding public trust as her primary objectives. During an interview following the announcement of her three-year appointment, Reimer emphasised the urgent need for the federal government to adopt a proactive stance against the proliferation of false health information. “One of the biggest challenges with health misinformation is the speed at which it changes, because it doesn’t take a lot of time to come up with a lie,” she remarked, highlighting the dynamic nature of misinformation.
Rebuilding Trust Post-Pandemic
The COVID-19 pandemic significantly strained public trust in health institutions, a reality that Reimer acknowledged. “Because there was so much difficulty — people were losing jobs and income, people were being separated from loved ones. And whether or not those were right decisions, it was hard,” she noted. She underscored that the journey to restore trust will be a lengthy one, requiring sustained efforts over several years.
The pandemic thrust public health officials into the limelight, with Dr. Theresa Tam, Reimer’s predecessor, becoming a familiar figure as she provided near-daily updates on evolving epidemiological data and public health guidance. Tam retired in June after an impactful eight-year tenure, leaving behind a legacy that Reimer now inherits.
Tackling the Measles Crisis
Reimer brings firsthand experience to her new role, having served as the chief medical officer for the Winnipeg health authority, where she was instrumental in Manitoba’s COVID-19 vaccine rollout. This experience is particularly relevant as Canada faces a resurgence of vaccine-preventable diseases, including measles. Health Minister Marjorie Michel pointed out the critical nature of Reimer’s appointment, citing the emergence of threats from diseases like avian influenza A (H5N1), HIV, and tuberculosis, alongside the ongoing challenges posed by the illegal drug crisis and the harmful effects of misinformation.

Reimer expressed concern about the current measles outbreak, which has led Canada to lose its measles elimination status, a designation it had maintained since 1998. This alarming development is echoed by public health experts nationwide. “I come from a small town which is part of the measles outbreak and where we have seen a fair bit of vaccine hesitancy. We need to have partnerships from community leaders all the way up to the federal government,” she explained.
A Call for Reliable Health Information
The significance of misinformation extends beyond social media platforms. In December, Minister Michel highlighted that Canadian health institutions can no longer rely on American sources for trustworthy health information, particularly since the previous U.S. administration undermined many scientific and research bodies. Reimer insists on the importance of Canada independently ensuring the dissemination of reliable health information. “I know that there are still really amazing people in the American system doing wonderful work, and I think there’s a lot of ways that we can continue to work together,” she stated.
With a master’s degree in public health and a background in researching sexually transmitted diseases and drug-related harms, Reimer is well-equipped for the challenges ahead. Nancy Hamzawi, president of the Public Health Agency of Canada, expressed confidence in Reimer’s capabilities, stating, “At a time when strong, science-driven leadership has never been more important, I am confident that her vision and dedication will help advance the public health and well-being of Canadians.”
A Legacy of Leadership
Reimer’s leadership during the pandemic has been praised, with Dr. Margot Burnell, the current president of the Canadian Medical Association, commending her as a source of calm and measured guidance for Manitobans during uncertain times. As past president of the CMA, Reimer notably delivered a formal apology to Indigenous Peoples for the medical profession’s historical harms. During her tenure, she advocated vigorously against misinformation and fought for improved access to healthcare across Canada.

Dr. Reimer is set to officially commence her role on April 1, stepping into a position that will undoubtedly shape the future of public health in Canada.
Why it Matters
The appointment of Dr. Joss Reimer comes at a pivotal moment for public health in Canada. With rising vaccine hesitancy, misinformation, and the erosion of trust in health institutions, her leadership will be crucial in navigating these complex challenges. Rebuilding public confidence and ensuring that accurate, science-based information prevails are essential for safeguarding the health of Canadians. As misinformation continues to threaten public health, Reimer’s proactive approach could be a significant turning point in the fight for a healthier, more informed society.