Monkeypox and Other Orthopoxviruses

Suspected cases must be reported immediately by phone to the Thunder Bay District Health Unit at 625-5930 or toll-free 1-888-294-6630, ext. 5930 (Monday-Friday, 8:30am to 4:30pm). After hours and on weekends/holidays call Thunder Bay Answering Service at (807) 624-1280.


  • The Ministry of Health has released update:  "Mpox in 2023: Information for Clinicians" (March 10, 2023).
  • TBDHU continues to offer first and second doses of vaccine; clients can call 807-625-5900 (press 4) to make an appointment



Consistent with the World Health Organization’s November 28, 2022 announcement, Public Health Ontario will now refer to human monkeypox disease as mpox. The virus that causes mpox will still be called “monkeypox virus” while the International Committee on the Taxonomy of Viruses (ICTV) continues its process for reconsidering the naming conventions for all orthopoxvirus species.

In addition, consistent with the August 2022 announcement from WHO, PHO will replace references to the monkeypox virus Central African/Congo Basin clade as Clade I and the West African clade with Clade II. Public Health Ontario laboratory tests for monkeypox virus will continue to be referred to as monkeypox tests and health care providers and others who submit a sample for testing, should request a monkeypox test.



Additional Resources

Last Updated: 13/03/2023