Dr. Joss Reimer has been appointed as Canada’s new chief public health officer, stepping into the role with a clear mission: to address the alarming rise of health misinformation and rebuild public confidence in health institutions. Announced on Friday, her three-year tenure comes at a crucial juncture for the nation’s health landscape, particularly in the wake of the COVID-19 pandemic’s significant impact on public trust.
Addressing Health Misinformation
In her first interview following the announcement, Reimer highlighted the urgency of tackling the pervasive spread of false information regarding health. “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 stated. This rapid dissemination of misleading content has made it increasingly difficult for the public to discern fact from fiction, creating a pressing need for proactive strategies from the federal government.
The pandemic revealed a stark erosion of trust in public health authorities, a sentiment Reimer is all too aware of. “During the pandemic, people were losing jobs and income, and many were separated from loved ones. Whether the decisions made were right or wrong, the impact was hard,” she reflected. “We have a lot of trust-building to do, and it’s going to take years.”
Challenges Ahead
Reimer takes over the role from Dr. Theresa Tam, who became widely recognised for her daily updates throughout the pandemic, becoming a key figure in Canada’s public health response. Tam retired in June after serving eight years, leaving a legacy that Reimer hopes to build upon.

As the former chief medical officer for Manitoba and a leader in the province’s COVID-19 vaccine implementation task force, Reimer brings invaluable experience to her new position. Minister of Health Marjorie Michel has emphasised the critical nature of Reimer’s appointment, noting that Canada faces a resurgence of vaccine-preventable diseases like measles, alongside ongoing threats from avian influenza and the illicit drug crisis.
Regional Insights on Vaccination
Reimer’s perspective is particularly enriched by her background; she hails from a small town currently affected by vaccine hesitancy linked to the ongoing measles outbreak. “We need to forge partnerships that span from community leaders to the federal government,” she asserted. Public health experts are alarmed that Canada has lost its measles elimination status, which it had maintained since 1998, signalling a worrying trend that has also put the United States and Mexico at risk.
The rise in measles cases is not surprising to Reimer, who notes, “Measles is incredibly infectious, and the increase is exacerbated by misinformation and vaccine hesitancy.”
The Importance of Reliable Information
Misinformation is a multifaceted challenge, and Reimer acknowledges that it extends beyond social media. According to Michel, the reliability of information from American health institutions has diminished, particularly following the Trump administration’s cuts to research funding and the dissemination of false vaccine narratives. “We need to ensure that Canada stands on its own and that we are sharing trustworthy information,” Reimer remarked, while also recognising the valuable contributions of American public health professionals.

With a master’s degree in public health, Reimer has a background in researching sexually transmitted diseases and drug-related harms. Nancy Hamzawi, president of the Public Health Agency of Canada, expressed optimism regarding Reimer’s leadership, 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 experience extends to her past presidency at the Canadian Medical Association, where she issued a formal apology for the medical profession’s historical harms to Indigenous Peoples. Current CMA president Dr. Margot Burnell praised Reimer as a source of calm and measured leadership during the pandemic, highlighting her commitment to combating false health information and advocating for improved access to care across Canada.
Reimer’s official term will commence on April 1, and her leadership will be pivotal as Canada navigates the complexities of public health in an era marked by skepticism and misinformation.
Why it Matters
Dr. Joss Reimer’s appointment as chief public health officer comes at a critical time as Canada faces significant public health challenges exacerbated by misinformation and distrust. Her focus on rebuilding trust and promoting reliable health information is essential for not only addressing current health crises but also for ensuring a healthier future for all Canadians. As the nation grapples with the consequences of the pandemic and rising vaccine hesitancy, effective leadership will be vital in restoring public confidence and safeguarding the health of communities across the country.