Dr. Joss Reimer has officially been appointed as Canada’s new chief public health officer, with a clear mandate to combat health misinformation and restore public trust in health institutions. Following her announcement on Friday, Reimer emphasised the urgent need for proactive measures to counteract the rapid spread of false health information that has plagued the country, particularly since the COVID-19 pandemic.
A New Era in Public Health Leadership
In her first interview since the appointment, Reimer spoke candidly about the challenges facing public health in Canada. “One of the biggest challenges with health misinformation is the speed at which it changes,” she explained. “It doesn’t take long to create a lie.” This acknowledgment of the evolving landscape of health communication underlines her commitment to addressing the pervasive issue of misinformation head-on.
Reimer, a native of Manitoba, recognised that trust in public health institutions has been significantly eroded throughout the pandemic. “People experienced job losses, income instability, and separation from loved ones, which made it difficult to navigate the health decisions being made,” she reflected. “Rebuilding this trust will require years of dedicated effort.”
The Legacy of Dr. Theresa Tam
Dr. Reimer steps into her new role following the retirement of Dr. Theresa Tam, who became a prominent figure throughout the pandemic. Tam’s near-daily updates helped guide Canadians through an uncertain period. Reimer herself is no stranger to public health crises; she served as the chief medical officer for the Winnipeg health authority and led Manitoba’s COVID-19 vaccine implementation task force, positioning her well for the challenges ahead.

Health Minister Marjorie Michel highlighted the importance of Reimer’s appointment during this critical period, noting a resurgence of vaccine-preventable diseases such as measles, alongside threats from avian influenza A (H5N1), HIV, tuberculosis, and the ongoing opioid crisis. “False health information poses a significant challenge to our public health landscape,” she stated.
Addressing Vaccine Hesitancy and Misinformation
Reimer’s insights into the current measles outbreak are particularly pertinent, given her background in a community experiencing notable vaccine hesitancy. “We need to forge partnerships from local community leaders to federal authorities to tackle this issue effectively,” she remarked. The outbreak has now resulted in Canada losing its measles elimination status, a concerning trend echoed by public health experts.
The rise in measles cases is not entirely surprising, according to Reimer. “Measles is incredibly infectious, and the increase in misinformation and vaccine hesitancy has only exacerbated the situation,” she said. Canadian health officials have warned that the threat of misinformation extends beyond social media, with implications for the credibility of health information sources.
Rebuilding Trust through Science and Collaboration
As Canada seeks to navigate these complex challenges, Reimer advocates for a robust and independent health information framework. She expressed the need for Canada to rely on its own resources while continuing to collaborate with American counterparts: “There are still incredibly talented individuals within the U.S. health system, but it is essential that we share trustworthy information that Canadians can rely on.”

Reimer’s extensive qualifications, including her master’s degree in public health and a history of research on sexually transmitted diseases and drug-related harms, equip her for the role. Nancy Hamzawi, president of the Public Health Agency of Canada, expressed confidence in Reimer’s ability to provide the science-driven leadership that is crucial at this juncture.
Dr. Margot Burnell, current president of the Canadian Medical Association, praised Reimer’s calm and measured leadership during the pandemic, noting her commitment to combating misinformation and advocating for equitable access to care.
Why it Matters
The appointment of Dr. Joss Reimer as Canada’s chief public health officer comes at a pivotal moment. As misinformation threatens the health of populations and trust in public institutions wanes, her leadership will be critical in steering the nation towards a healthier future. By prioritising transparency, collaboration, and science-based communication, Reimer aims to restore faith in public health initiatives, ultimately ensuring the well-being of Canadians across the country.