Previous health care provider updates can be found here


Updated COVID-19 Guidance


Workplace Masking Rules Extended 

The Chief Medical Officer of Health is maintaining existing provincial masking requirements in select higher-risk indoor settings until June 11, 2022, after which the ministry will issue guidance on personal protective equipment recommendations for infection prevention and control in health care settings.
Provincial masking requirements which were set to expire on April 27, 2022 are being extended in current settings until 12:00 a.m. on June 11, 2022, including:
  • health care settings (e.g., hospitals, doctors’ offices, clinics that provide health care services, laboratories, specimen collection centres, and home and community care);
  • long-term care homes;
  • retirement homes;
  • shelters and other congregate care settings that provide care and services to medically and socially vulnerable individuals; and
  • public transit.
A complete list of settings where masking requirements continue to apply is available online.
See the entire announcement.
See the Section 22 class order, effective April 27, 2022 at 12:00 am, which contains a complete list of settings where masking requirements continue to apply until June 11.


WEBINAR: COVID-19 Vaccine Safety

COVID-29 Immunity Task Force/CanCOVID’s 7th seminar will bring together experts affiliated with the CITF to discuss vaccine safety. Presenters will report on:
  • Results of ongoing vaccine safety monitoring in Canada, in both adults and children.
  • Details about serious adverse effects in Canada, including their frequency after various vaccine doses.
  • Measures to mitigate the occurrence of serious adverse events.
  • More!
Date: May 5, 2022
Time: 11:30am to 1:00pm EDT

Save the date here.


SURVEY: COVID-19 Vaccination Support Needs

  • The Public Health Agency of Canada (PHAC) is surveying health care providers practicing in Canada to learn more about the training and resources that are most useful to help support vaccination decisions with patients or clients.
  • Given that patients and/or clients rely on a wide range of practitioners in making vaccination decisions, it is important that opinions are heard from people working in a variety of specialties and health care related fields.
  • The survey should take 10 to 15 minutes to complete and is open until April 29th, 2022.
  • If you have any questions or comments, please contact
  • Complete the survey here.


4th Dose Interval Clarification

The fourth dose is recommended 140 days after the third dose for individuals 60 years of age and older (date of birth eligibility; must be 60 on the day of the appointment), however individuals may receive the fourth dose at a minimal interval of 84 days, if they choose. Considerations for administering at the minimum interval can be found in NACI’s initial guidance on a second booster dose of COVID-19 vaccines in Canada (April 5, 2022).

Thank you for your cooperation in providing the vaccine to eligible clients who have made the decision to receive their fourth dose between 84 and 140 days, taking into consideration local and provincial epidemiology and risk.

Please see COVID-19 Vaccine Third Dose and Booster Recommendations and COVID-19 Vaccine Administration for additional information.

Please contact our Senior Public Health Nurses with any questions: Abbey Nedgial Abbey.Nedgial@TBDHU.COM or Leah VanderPloeg Leah.VanderPloeg@TBDHU.COM


COVID-19 Treatments

For information on COVID-19 treatments, including Paxlovid, please check the Ontario Health COVID-19 Health System Response Materials webpage regularly.

See Nirmatrelvir/Rotinavir (Paxlovid): What Prescribers and Pharmacists Need to Know | Ontario Science Table, February 2022.

Questions about antivirals should be sent to Ontario Health contacts Cynthia Stables ( and Jennifer MacKinnon (


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Thunder Bay District Health Unit · 999 Balmoral Street · Thunder Bay, On P7B 6E7 · Canada