Your genome holds the key to more effective treatment – Canada is unlocking the data to deliver it

Sapna Mahajan, VP, Policy and Public Affairs, Genome Canada; Stephen W. Scherer, Chief of Research, The Hospital for Sick Children (SickKids)

---

It took scientists 13 years to sequence the first human genome. Today, it can be done in a day. The cost has dropped from billions to hundreds of dollars, and the technology that once required an international consortium now runs in sequencing centres across Canada.

 

That breakthrough isn’t just about speed. It is about what speed makes possible.

 

For most of the history of genetics in medicine, doctors could only look at small pieces of the puzzle. They tested for specific genes linked to specific conditions – BRCA mutations after a family history of breast cancer, or a handful of known causes when a newborn showed signs of a metabolic disorder. That approach has saved lives, but it has been limited by what we already knew to look for.

 

Whole genome sequencing changes the equation. Instead of checking a few genes, it reads a person’s entire genetic code – roughly three billion letters of DNA. When you do that for tens of thousands of people, patterns emerge that were previously invisible. Researchers can see why some people develop a disease and others do not, why a drug works for one patient and fails for another, why certain populations carry risks that medicine has never accounted for.

 

This is precision health: not a single test or treatment, but a fundamentally different way of understanding disease, built on data rather than averages.

 

Canada is now making major investments in human genome sequencing – and in co-ordinating that data – to drive precision health forward.

 

The Genome Canada-led Canadian Precision Health Initiative (CPHI) launched last year to build Canada’s largest-ever national human genomic databank.

Backed by $81 million in federal funding and more than $100 million in co-funding from other governments and institutions, the initiative will begin by sequencing the genomes of more than 100,000 people over four years – bringing most of that data into a shared national resource. The goal is to keep building from there, creating a databank that grows more powerful with every genome added.

 

The first 12 CPHI research projects that will produce the sequencing data are underway, each focused on a major health challenge: rare diseases, cancer, stroke, cardiovascular disease, children’s mental health, neurological disorders and newborn screening. The portfolio of projects was selected to ensure the data, and the insights it generates, represent Canada’s diverse population.

 

Why does scale matter? Consider a common scenario. Two patients receive the same diagnosis and the same treatment. One responds well. The other does not. A third experiences side effects that might have been avoided with better information. These differences are often genetic, but without enough data they are hard to interpret reliably.

 

For patients with rare diseases, the stakes are especially clear. The diagnostic journey can stretch across years of appointments, referrals and inconclusive tests. A single genome sequence can sometimes replace all of that with a clear answer. This initiative alone expects to deliver new diagnoses to as many as 2,200 families within four years.

 

Keeping more Canadian health data secure at home

 

Every day, Canadian health data leaves the country. Blood and tissue samples are shipped abroad for testing. Consumer genetics companies have collected millions of Canadians’ genetic profiles. Results come back, but the data stays. And the value of that data only grows: every genome added to a dataset makes the whole thing more powerful. The question is whether that value benefits Canadians or companies outside our borders.

 

The CPHI aims to reverse that pattern. The data it generates will be stored securely in Canada, under Canadian privacy and security frameworks. Participation is voluntary and grounded in informed consent. Rather than enriching foreign platforms, this data will remain a national resource, with controlled access for Canadian researchers, clinicians and companies working to improve care here.

 

The initiative also includes distinct approaches to Indigenous data governance. All funded projects are required to uphold the First Nations principles of OCAP (ownership, control, access and possession), with distinct data-sharing options for Indigenous participants.

 

The global race to harness genomic data is already underway

 

From the UK to Singapore to Australia, genomic data is being built into national health systems. Genomic data is fast becoming essential health care infrastructure, and the countries that build it are better positioned to deliver modern care and compete in the global life sciences economy.

 

Canada has the scientific talent and research networks to lead in precision health. What it has lacked is co-ordination. Health data has been fragmented across provinces, institutions and programs, limiting what anyone could do with it. The CPHI helps change that – generating and connecting genomic data responsibly across the country so Canada can finally harness one of its most life-saving, and valuable, resources.