A growing coalition of Canadian and international scientists is calling for an immediate suspension of COVID-19 mRNA vaccinations, citing serious safety concerns and regulatory failures. The open letter, spearheaded by the group Call to Halt-19, demands a full recall of the vaccines, an independent public inquiry into their approval process, and comprehensive research into their long-term effects.
The letter, currently circulating for signatures, has drawn support from experts in virology, immunology, biochemistry, and medicine. Among the notable signatories are Dr. Patrick Provost (Université Laval), Dr. Steven Pelech (University of British Columbia), and Dr. Claudia Chaufan (York University). These researchers argue that the Canadian government and public health agencies have ignored mounting evidence of safety risks associated with mRNA vaccines.
Unanswered Questions and Alarming Findings
The letter outlines multiple scientific concerns, including:
- Undisclosed DNA Contaminants: Independent analyses in Canada, the U.S., and several European countries have found residual plasmid DNA in vaccine vials—DNA that has potential oncogenic (cancer-promoting) and infectious risks. These fragments, the scientists warn, could integrate into human cells, something regulators have not adequately investigated.
- The Presence of SV40 DNA Sequences: This particular DNA sequence, typically used in gene therapy to help foreign DNA enter human cells, was found in Pfizer’s COVID-19 vaccine. Health Canada has since confirmed its presence but insists it serves no function in manufacturing—raising questions as to why it was there in the first place and why it was never disclosed.
- Unexpected Changes to the Immune System: New research suggests that repeated mRNA vaccinations may trigger an unwanted shift in the immune system, increasing levels of IgG4 antibodies—a type linked to immune tolerance, which could make individuals more vulnerable to reinfections, autoimmune diseases, and even cancer progression.
- Batch-Specific Safety Signals: Multiple analyses indicate that adverse reactions to the vaccines vary significantly by batch, suggesting inconsistencies in manufacturing and quality control. If true, this could mean that some doses pose far higher risks than others—yet regulators continue to treat them as identical.
These findings, the letter argues, paint a picture of reckless oversight—one where regulators either failed to properly vet the vaccines before their rollout or deliberately turned a blind eye to safety signals.
A Global Reckoning on mRNA Vaccines
The Canadian researchers are not alone in their concerns. Across the world, scientists, politicians, and public health experts are questioning the long-term safety of mRNA technology.
In Australia, Member of Parliament Russell Broadbent, along with 52 scientists and healthcare professionals, issued a public demand to hault the vaccine. In Europe, the NORTH group, a coalition of scientists and policymakers, sent letters of concern to 23 national governments, echoing many of the same issues raised in the Canadian letter.
Meanwhile, in Canada, the National Citizens Inquiry—a citizen-led investigation into the country’s COVID-19 response—heard testimony from hundreds of experts and whistleblowers, many of whom presented evidence contradicting official vaccine safety claims.
Regulators Dig in Their Heels
Despite growing global scrutiny, regulatory agencies continue to insist that the benefits of mRNA vaccines outweigh the risks. Health Canada, the World Health Organization, and the Centers for Disease Control and Prevention have yet to acknowledge or publicly address the issues raised by independent researchers.
This unwillingness to engage, the signatories argue, is precisely the problem. “Science is never settled,” said one of the letter’s authors. “We have new data, new safety concerns, and yet regulators are refusing to act. That is not science. That is politics.”
Even as vaccine mandates fade, governments continue recommending booster shots. Meanwhile, vaccine-injured individuals say they have been dismissed, censored, or gaslit—left without acknowledgment, let alone compensation.
The Call to Halt-19 researchers are demanding more than just an end to COVID-19 mRNA vaccinations. They want accountability. They want transparency. And they want real, independent science to guide public health policy.
They are calling for an immediate suspension of COVID-19 mRNA vaccines until an independent investigation is completed; a full disclosure of regulatory documents and vaccine trial data, funding for independent studies on the potential long-term effects of mRNA technology, and a compensation program for those who have suffered vaccine-related injuries.
The letter has already gained traction among scientists and the general public, but whether policymakers will act remains to be seen.
