Tuesday, December 9th, 2025

As of Wednesday, June 23, individuals who received their first dose of an mRNA vaccine on or before May 30 and who live in the catchment area of one of the 10 public health units identified as Delta hot spots, including Simcoe-Muskoka, will be eligible to book or rebook their second dose appointment at a shortened interval.

With a majority of Ontario adults having received their first dose of the vaccine, providing a strong level of protection from COVID-19, the province is accelerating eligibility to book a second dose appointment as follows:

Expanding the number of Delta hot spots and rapidly expanding second dose coverage in these areas will help to minimize the risk of the variant’s spread throughout the province.

In addition, effective June 14, 2021, 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.

Ontario’s allocation of the Pfizer COVID-19 vaccine meant to arrive during the first two weeks of July will be lower than initially projected (decreased from approximately 885,000 to 348,000 doses) and is planned to catch up during the last two weeks of July. The government will adjust and mitigate any impacts of this decrease to the provincial vaccine rollout.

The province will continue to expand eligibility for accelerated second doses across Ontario as additional vaccine allocations and shipment timelines are confirmed by the federal government.

Individuals who are eligible to receive an accelerated second dose are invited to schedule their appointment through the provincial booking system, directly through public health units that use their own booking system, and through participating pharmacies. Select primary care providers will also be reaching out to book appointments.

“The large increase of Moderna vaccines and steady supply of Pfizer has enabled Ontario to speed up second dose appointments, target hot spot areas and provide more options for people to become fully immunized,” said Solicitor General Sylvia Jones. “With every vaccine administered we are making meaningful progress in our collective efforts to protect our loved ones and keep communities safe.”

All vaccines provided as part of Ontario’s vaccine rollout provide strong protection against COVID-19 and its variants, including the Delta variant. In addition, the National Advisory Committee on Immunization (NACI) has confirmed that a mixed vaccine schedule can be completed safely and is effective. To ensure maximum protection against COVID-19 and the Delta variant, Ontarians are encouraged to get vaccinated as soon as they can and to receive their second dose within the recommended interval.

As of June 16, 2021, the province’s public health units, mass vaccination clinics, hospital sites, pharmacies, and physicians have administered nearly 12 million doses of COVID-19 vaccines to Ontarians. Over 75 per cent of adult Ontarians are benefitting from the protection of a first dose of vaccine, and more than 19 per cent are fully immunized. In addition, youth clinics hosted by public health units are operating across the province and have administered first doses to more than 48 per cent of youth aged 12 to 17 to date.

Leave a Reply

Your email address will not be published. Required fields are marked *