COVID-19 Vaccine – Second Dose Appointments
Adults ages 70+ who have received a first dose of the mRNA COVID-19 vaccine (Pfizer or Moderna) more than 28 days ago and would like to move up their second doses are eligible to do so.
Adults ages 70+ who have received a first dose of the mRNA COVID-19 vaccine (Moderna or Pfizer) more than 28 days ago and would like to move up their second doses are eligible to do so.
As of Monday, June 21, 2021 at 8 am, everyone who received their first dose of an mRNA COVID-19 vaccine (Moderna or Pfizer) on or before May 9, 2021 will be eligible to rebook their second dose appointment for an earlier date.
As of Wednesday, June 23, 2021 at 8 am, individuals who received their first dose of an mRNA vaccine (Moderna or Pfizer) on or before May 30, 2021 who live Hamilton will be eligible to rebook their second dose appointment for an earlier date.
Starting the week of June 28, 2021 everyone aged 18 and over who received their first dose of an mRNA COVID-19 vaccine (Moderna or Pfizer) will be eligible to rebook their second dose appointment, as long as it is scheduled at least 28 days after the first dose.
Effective June 14, individuals who received their first dose of the AstraZeneca vaccine are also eligible to receive a second dose of a COVID-19 vaccine at an interval of eight to 12 weeks, with informed consent. This can include a second dose of AstraZeneca or an mRNA vaccine (Moderna or Pfizer).
Book a new appointment
You can book your vaccine appointment through the provincial phone line or online booking portal if you have a green Ontario photo health card (OHIP); expired cards will be accepted .
Visit the provincial booking portal at
Visitez le portail de réservation provincial au ontario.ca/rendezvousvaccin
If you don’t have a green Ontario photo health card, you can call the Public Health Services COVID-19 Vaccine Hotline at 905-974-9848, option 7 to re-book your second dose appointment.
Where can I get my second dose if I received my first dose at a mobile pop-up clinic?
If you received your first dose of vaccine at a local mobile pop-up clinic, you can:
- Attend your previously booked appointment date/time/location.
- Reschedule your appointment to an earlier date at a large-scale clinic. Follow the instructions above to re-book.
At this time, the original mobile pop-up schedule cannot be adjusted to add clinics for a shortened dose interval.
If I received Pfizer for my first dose, can I get Moderna for my second dose?
The National Advisory Committee on Immunization (NACI) has confirmed that a mixed vaccine schedule (receiving both Moderna and Pfizer) can be completed safely and is effective. All vaccines provide strong protection against COVID-19 and its variants. To ensure maximum protection against COVID-19 and the Delta variant, people are encouraged to get vaccinated as soon as they can and to receive their second dose within the recommended interval.
I received AstraZeneca for my first dose. What vaccine should I book as my second dose & when?
An mRNA vaccine is preferred as the second dose for individuals who received a first dose of the AstraZeneca vaccine, based on emerging evidence of a potentially better immune response from this mixed vaccine schedule. You will need to make sure you have at least 8 weeks between each dose. This aligns withNational Advisory Committee on Immunization (NACI) recommendations and Ontario government direction.
With informed consent, individuals can choose between a second dose of AstraZeneca or an mRNA vaccine, at an 8 to 12-week interval, recognizing that while waiting 12 weeks helps to ultimately provide more protection, some may choose to receive their second dose sooner to have the increased protection provided by a second dose earlier.
Evidence from multiple studies indicates that mixing of COVID-19 vaccines (receiving an mRNA vaccine after an AstraZeneca vaccine) at dosing intervals between eight and 12 weeks is safe and demonstrates a beneficial immune response. There is a possibility of increased short-term side effects after the second dose when using different vaccine types, including headache, fatigue and muscle aches.
|Date||Option for second dose||How to access|
|Beginning June 4, 2021||AstraZeneca vaccine, received 8 to 12 weeks after your first dose||Contact the pharmacy or primary care provider where you received your first dose or you can contact a different location to book an appointment.|
|Week of June 7, 2021||mRNA (Moderna or Pfizer) vaccine, received 8 to 12 weeks after your first dose||Book a “second dose only” appointment online at Ontario.ca/bookvaccine|
In Hamilton, primary care physicians are booking appointments for 2nd doses of AstraZeneca. If you received your first dose of AstraZeneca more than 8 weeks ago, you can now book an appointment to get your 2nd dose.
How can I cancel my other appointment if I re-book?
If you booked your appointment through the Provincial online portal, it will automatically cancel your previously booked appointment after you book a new one.
If you booked your first appointment through the Vaccine Hotline for the St. Joe’s West 5th clinic, fill out this cancellation form if you booked your second appointment at a pharmacy and need to cancel the appointment at St. Joe’s West 5th.
If you booked your first appointment through the Vaccine Hotline for any of the other vaccine clinics, you can call the Vaccine Hotline at 905-974-9848, option 7 to cancel an appointment you no longer need.
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