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    1. Home
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    Health Professionals Update – Vol. 18, No. 19

    August 5, 2025

    From:
    Monica Hau, MD, MSc, CCFP, FRCPC
    Associate Medical Officer of Health

    In this issue

    • Adverse Event Following Immunization (AEFI) reporting update

    Key messages                                                                                         

    • Vaccine safety resources have now been updated and are available on Public Health Ontario’s website
    • Health care providers are required by law to report adverse events following immunization to their local public health unit

    Adverse Event Following Immunization (AEFI) reporting update

    The following vaccine safety resources have now been updated and are available on Public Health Ontario’s website:

    • Adverse Event Following Immunization (AEFI) reporting form
    • AEFI fact sheet for health care providers

    These updates include:

    • Integration of select COVID-19 Adverse Events of Special Interest (AESIs) into general AEFI categories.
    • Revisions to adverse event types to align with the updated national reporting form from the Public Health Agency of Canada.

    The COVID-19 AESI Technical Brief will be retired on July 21.
    Health care providers (such as physicians, nurses, and pharmacists) are required by law to report AEFIs. Fax the completed AEFI reporting form to Peel Public Health at 905-565-0426. 
    For additional information on how to report an adverse reaction to vaccination and vaccine safety resources visit: vaccine safety.

    Contact us

    The Health Professionals Update (HPU) is distributed to physician offices in Peel Region via fax or email. Share this update with other health professionals in your clinic. 

    More information:

    • Review past HPUs
    • Subscribe to HPU emails
    • For questions about this update, email healthprofessionals@peelregion.ca
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