Ontario Ministry of Health’s Annual Influenza Letters

Below are the annual letters and posters regarding influenza from the Office of the Chief Medical Officer of Health, for distribution to partners in Ontario.  As the situation with highly pathogenic avian influenza (HPAI) in particular is ongoing, those who may encounter birds and animals, through their work or an activity, are encouraged to continue to take precautions to protect themselves from influenza.  Please help spread the word through dissemination of these letters and posters to the applicable groups.

Letters (October 2025)

Posters