Preserving the Canadian public health record
See what Canadian public health websites used to say, even after they change.
Government health pages change without warning — guidance is updated, tables are revised, dashboards disappear. HealthArchive.ca captures and preserves what was there, so you can find it, cite it, and track what changed.
Project snapshot
Live metrics from the archive backend.
- Archived snapshots
- 0snapshots
- Unique pages
- 0pages
- Sources tracked
- 0sources
Last capture: May 3, 2026
Coverage is bounded to the current corpus; archived content may be incomplete, outdated, or superseded, and features may change.
How it works
HealthArchive uses modern web-archiving tools to capture, index, and replay public health pages.
Capture
Selected public health websites were crawled to create the existing corpus, with full-page snapshots preserved in the WARC archival format.
Index
Each capture is time-stamped, language-detected, and indexed so it can be searched by keyword, source, or date range.
Search & cite
You search the archive, view snapshots as they appeared, compare versions side-by-side, and get a permanent, citable link.
Who is this for?
Anyone who needs to know what a Canadian public health website said at a specific point in time.
Clinicians & public health practitioners
Guidance changes, but you need to know what it said last year. Find and cite past recommendations on COVID-19 vaccination, influenza, naloxone, and more.
Search health guidance →Researchers & data journalists
Need to prove what a page said on a specific date? Link your analysis to the exact wording, tables, and dashboards that were published — not what’s there now.
Explore the data →Members of the public
Curious what officials said about a health topic last year? See how public health messaging has evolved, while keeping official sites as your go-to for current guidance.
Browse the archive →Sources we track
Federal public health websites represented in the current archive corpus.
Track what changed
HealthArchive detects text changes between captures and shows you exactly what was added, removed, or revised.
Previous version
Mpox vaccination is recommended for
individuals at high risk of exposure,
including men who have sex with men.
Updated version
Mpox vaccination is recommended for
individuals in communities where mpox
is spreading, based on local risk assessment.
When guidance changes, the record should remain
In 2024, public health agencies updated their mpox guidance pages. The previous versions — with different risk categories and recommendations — are no longer on the live sites. But they’re preserved in HealthArchive, citable and searchable.
See the archived snapshot →Recent activity
First archived capture for this page.
Health Canada · change detected · 231 days ago
First archived capture for this page.
Health Canada · change detected · 231 days ago
First archived capture for this page.
Health Canada · change detected · 231 days ago
First archived capture for this page.
Health Canada · change detected · 231 days ago
First archived capture for this page.
Health Canada · change detected · 231 days ago
Frequently asked questions
Is this an official government website?
No. HealthArchive.ca is an independent, volunteer-led project. It is not affiliated with, endorsed by, or associated with any government agency. For current guidance, always consult the official source website.
How often are pages captured?
The existing corpus records source-specific capture dates and labeled editions. No future schedule is assumed; any new scheduled or ad-hoc capture requires a separately authorized data-continuity decision.
Can I suggest a page or source?
Use the Contact page to share feedback for assessment. A suggestion does not commit the project to new capture work or broader coverage; any future inclusion requires a separately authorized data-continuity decision.
How do I cite a snapshot?
Each archived snapshot has a permanent URL and a copy-citation button. You can cite it like any web resource, including the capture date and the HealthArchive URL.
How is this different from the Wayback Machine?
The Wayback Machine archives broadly across the entire web. HealthArchive focuses specifically on Canadian public health content, with purpose-built change tracking, structured search, and citation-ready links.
Is HealthArchive open source?
Yes. The frontend and backend code are available on GitHub. Contributions and feedback are welcome.
Start searching
Find the exact version of any archived page — by keyword, source, or date.