COVID-19 Vaccines: Dose Information

Stay up to date on all COVID-19 vaccine doses

With a significant increase in COVID-19 infections expected in the TBDHU area during this current wave, everyone is encouraged to stay up to date and receive all recommended COVID-19 vaccine doses, including any booster dose(s) when eligible. 

  • Individuals aged 5 to 11 years old: two doses as a primary series
  • Individuals aged 12 and older: two doses as a primary series and a booster dose

Note: The above references mRNA vaccines. 

Some individuals may receive a third dose for their primary series if they meet specific criterias as someone who is immunocompromised (see the Third Doses for Specific Populations tab below).

Second boosters are now recommended for certain groups of individuals. This would represent a fourth dose for most people and a fifth dose for those who received a three dose primary series.

Second boosters (fourth or fifth doses) are available for:

  • Individuals aged 60 and over
  • First Nations, Inuit and Métis individuals and their non-Indigenous household members aged 18 and over
  • Residents of Long-Term Care Homes, Retirement Homes, Elder Care Lodges and Older Adults Living in other Congregate Settings

See the "Fourth Doses (Second Booster)" and "Fifth Doses for Specific Populations (Second Booster)" tabs below for full details (and check out the Date Eligibility Chart for help in figuring out when you can get your dose based on when you got your first booster).

Staying up to date and receiving all COVID-19 vaccine doses you are eligible for, helps to increase protection against symptomatic infection and severe outcomes at the individual level. It also helps to reduce transmission at the population level.

Need more information? See the information in the tabs below, including eligibility and dose intervals. Details are also outlined in the Ministry of Health's Staying Up to Date with COVID-19 Vaccines: Recommended Doses document.

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.

Previous COVID-19 infection? For information on when individuals who have had a COVID-19 infection should receive their vaccine, see the Vaccine Facts page.


Specific Dose Information


What’s the difference between third and booster doses?

Primary series vs Booster

Last Updated: 04/05/2022