COVID-19 Vaccines: Dose Information

Stay up to date on all COVID-19 vaccine doses

Everyone is encouraged to stay up to date and receive all recommended COVID-19 vaccine doses. 

Where to get vaccinated? See the COVID-19 Vaccine Appointments/Walk-ins page for the City of Thunder Bay OR the District COVID-19 Vaccination Clinics page for district communities.



Dose Eligibility for the General Public (not immunocompromised)


Dose Eligibility for those who are Immunocompromised

Immunocompromised individuals who meet specific criteria are recommended to receive three doses as part of the initial COVID-19 vaccine series. Three doses are given to enhance the immune response and establish an adequate level of protection for those who are immunocompromised and who may not have developed the best immune response to the first and second dose.  

The three dose primary series is for anyone who is 5 years and older and meets any of the criteria listed below:

If you have questions about your eligibility, please contact the Provincial Vaccine Contact Centre at 1-833-943-3900 (TTY for people who are deaf, hearing-impaired or speech-impaired: 1-866-797-0007), which is open seven days a week from 8 a.m. to 8 p.m. and capable of providing assistance in more than 300 languages.

Primary Series

All those who are 6 months and older are eligible for a three dose series.

  • 1st dose
  • 2nd  dose, 8 weeks after 1st  dose
  • 3rd  dose, 8 weeks after 2nd dose;
    • The Ontario recommended interval between the second and third dose is at least 56 days. Discuss the exact timing with your health care provider to optimize the immune response and minimize delays in treating the underlying condition.

Note: Individuals 12-29 are recommended to receive the Pfizer-BioNTech vaccine. See the Vaccine Facts page for more details.

Booster Doses


Where to get a third and booster dose(s) for those who are immunocompromised:


Time Interval for COVID-19 Vaccines after Infection

It is important to ensure that self-isolation has been completed and that the individual has recovered prior to visiting a vaccination clinic.

There are also time intervals following infection that should be followed to ensure maximum protection from the vaccine.

Did you have your COVID-19 infection:

  • Before your first or second dose? Wait until 8 weeks after you had symptoms or after you received a positive test (if you had no symptoms). NOTE: If you are moderately to severely immunocompromised, you may wait 4 to 8 weeks. If you have a history of MIS-C (regardless of immunocompromised status) you should receive the vaccine dose when you are clinically recovered or it has been 90 days or longer.  
  • Before your FIRST BOOSTER dose and you are 12 to 17 years of age? Wait for dose at least 168 days (6 months) after you had symptoms  or received a positive test (if you had no symptoms).
  • Before your FIRST or SECOND BOOSTER and you are 18 and older?  Wait at least 84 days (3 months) after you had symptoms  or after you received a positive test (if you had no symptoms). 


    Last Updated: 23/09/2022