Dr. Joss Reimer has been appointed as Canada’s new chief public health officer, taking on the pivotal role amid growing concerns over health misinformation and the urgent need to rebuild public trust in health institutions. Announced on a Friday in late March, Reimer, who has extensive experience in public health, emphasised the necessity for proactive measures to counteract the rapid spread of false health information, which she described as a significant challenge in today’s environment.
The Challenge of Misinformation
Dr. Reimer pointed out that the swift evolution of health misinformation poses a unique threat to public understanding and safety. “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 noted. This statement underscores the urgency for the federal government to take decisive action in disseminating accurate information, particularly in the aftermath of the COVID-19 pandemic, which has severely tested public confidence in health authorities.
The pandemic era revealed vulnerabilities in public trust, as Reimer acknowledged the difficulties faced by Canadians during this tumultuous time. “People were losing jobs and income, and there were separations from loved ones,” she recounted. “Regardless of whether the decisions made were correct, the impact was hard on everyone.” The journey to restore trust in health institutions, she asserted, will require significant effort and time—potentially spanning years.
A Legacy of Leadership
Dr. Reimer steps into her role following the retirement of Dr. Theresa Tam, who has become a well-known figure thanks to her frequent updates during the pandemic. Reimer’s background as the chief medical officer for the Winnipeg health authority and her leadership of Manitoba’s COVID-19 vaccine implementation task force have prepared her for this pivotal position.

Health Minister Marjorie Michel praised Reimer’s appointment, highlighting the critical issues currently facing Canada, including a resurgence of vaccine-preventable diseases like measles, the threat of avian influenza A (H5N1), and the ongoing impacts of the illegal drug crisis. “The harmful impacts of false health information are also a major concern,” she added, signalling the multifaceted challenges that lie ahead for Reimer and her team.
Focus on Vaccination and Community Engagement
Reimer brings a personal perspective to the vaccination debate, particularly regarding the measles outbreak that has recently undermined Canada’s previous elimination status. “I come from a small town that is part of the measles outbreak and where we have seen considerable vaccine hesitancy,” she explained. To combat this, she emphasised the importance of forming partnerships that span from local community leaders to federal authorities.
The rise in measles cases, exacerbated by misinformation and vaccine hesitancy, is alarming. Reimer noted the disease’s highly infectious nature, stating, “It’s not surprising that measles cases are increasing given the surge in misinformation.” This highlights the urgent need for targeted community outreach and education to address these concerns.
The Path Forward
As Reimer prepares to assume her new role on April 1, she is keenly aware of the need for Canada to establish its own reliable sources of health information. She remarked that the misinformation crisis extends beyond social media, pointing out the erosion of trust in American health institutions following political shifts under the Trump administration. “Canada needs to stand on its own and ensure we’re providing trustworthy information,” she asserted.

With a master’s degree in public health and a history of advocating for meaningful change in healthcare, Reimer is well-equipped to lead the Public Health Agency of Canada during these challenging times. Her previous role as president of the Canadian Medical Association has already demonstrated her commitment to addressing health misinformation and improving access to care, particularly for vulnerable populations.
Why it Matters
Dr. Joss Reimer’s appointment as chief public health officer comes at a crucial juncture for Canada. The dual challenges of misinformation and trust erosion must be addressed to safeguard the health of Canadians. As misinformation continues to threaten public health initiatives, Reimer’s proactive approach and commitment to community engagement will be essential in restoring confidence in health systems. Her leadership will not only shape the response to current health crises but also lay the groundwork for a healthier, more informed Canada for generations to come.