Region of Durham

Select your priority group to start your appointment booking:

Primary series appointment

  • Children 6 months to under 5 years of age (must have reached 6 months of age).
  • If your child has recently received another vaccine, they must wait 14 days after that vaccine to receive the COVID-19 vaccine.
Vaccine product:
  • The Pfizer COVID-19 vaccine for infants and children 6 months to under 5 years is a three-dose primary series.
  • The Moderna COVID-19 vaccine for infants and children 6 months to under 5 years is a two-dose primary series.

Interval criteria: The recommended interval between primary series doses for this age group is 8 weeks (56 days) after the last dose and/or after symptom onset or positive test (if asymptomatic).

Primary series or booster dose appointment

If your child recently turned 5 and has already received a '6 month to 4 year' vaccine, please book their next dose using the 'age 6 months to 4 years' appointment type to continue with the same vaccine product, as recommended by the Ministry of Health.


Interval criteria:
  • Primary series: The recommended interval between the first and second dose is 8 weeks (56 days) after the first dose and/or after symptom onset or positive test (if asymptomatic).
  • Booster dose: The recommended interval for a booster dose is 6 months (168 days) or a minimum of 3 months (84 days), since the last dose received and/or after symptom onset or positive test (if asymptomatic).


Interval criteria: The recommended interval between primary series doses is 8 weeks (56 days) or 28 days with informed consent, after the last dose and/or after symptom onset or positive test (if asymptomatic).

Primary series appointment


Primary series interval criteria: The recommended interval between the first and second dose is 8 weeks (56 days) after the first dose and/or after symptom onset or positive test (if asymptomatic).


Interval criteria: The recommended interval between primary series doses is 8 weeks (56 days) or 28 days with informed consent, after the last dose and/or after symptom onset or positive test (if asymptomatic).

Vaccine product:
  • Ages 12 to 17 years: The bivalent Pfizer vaccine is the authorized bivalent product for individuals 12 to 17 years of age.
  • Ages 18+ years: There is no preference between bivalent Moderna or bivalent Pfizer as a booster dose for individuals 18 years of age and older.

Interval criteria: You should get your booster dose at the following recommended intervals since your last dose or following a COVID-19 infection:
  • Three months (84 days), if you are at high risk of severe COVID-19 illness as outlined by the province.
  • Six months (168 days), if you are not at a high-risk of severe COVID-19 illness. You may receive your booster dose at a minimum interval of at least three months (84 days); however, six months (168 days) may provide a better immune response.

Dose interval calculators

Use our date calculator tools to check when you are eligible for your next COVID-19 vaccine dose:

I am eligible 56 days after my last dose.

Date check: 56 days from the date you entered is (YYYY-MM-DD). Please ensure you book your next COVID-19 vaccine appointment on or after this date.

I am eligible 84 days after my last dose.

Date check: 84 days from the date you entered is (YYYY-MM-DD). Please ensure you book your next COVID-19 vaccine appointment on or after this date.

I am eligible 168 days after my last dose.

Date check: 168 days from the date you entered is (YYYY-MM-DD). Please ensure you book your next COVID-19 vaccine appointment on or after this date.

Carefully review the following question:

  1. Have you ever had a serious reaction following immunization that has not been investigated by your local health unit?

    Please contact the Durham Health Connection Line at 1-800-841-2729 or 905-668-2020 prior to booking a vaccination appointment. We need to follow-up to ensure it is safe for you to receive the vaccine at our clinics.