Ontario Accelerates Rollout of Second Shots Targeting a Two-Dose Summer

Ruben Hill
May 28, 2021

Last Friday, Ontario announced that it would start giving second doses of the vaccine to those who received a first AstraZeneca shot between March 10-19.

Second dose appointments are now open for anyone who received their first dose between March 10 and March 19 with informed consent due to the 10-week interval.

Individuals who received a first dose of AstraZeneca could receive a second dose of a different vaccine if required, officials said while warning that the province is still waiting for more guidance on mixing vaccines.

As a result of shortening the dose interval, officials expect that all Ontario residents 12 years and up who want to be vaccinated will receive their second dose by the end of August.

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Read the full presentation below. The province will then continue to expand eligibility for second dose appointments based on date of first dose. With over 8.6 million doses administered, and over 8 million people having received at least one dose, the province has reached its target to administer first doses to 65 per cent of Ontarians aged 18 and over by the end of May. For example, this included individuals with the highest-risk health conditions and special education workers.

Week of August 2: individuals who received their first dose between the week of May 10 to May 30, on a "first-in, first-out" basis.

Approximately 31,000 doses of AstraZeneca vaccine are set to expire after May 31, however all AstraZeneca doses distributed to pharmacies will undertake quality assurance reviews prior to being administered.

To support this accelerated rollout, the province has developed an anticipated schedule for eligibility to accelerate second doses based on confirmed supply.

"My promise to Manitobans is that as soon as this United Kingdom data comes out, if we see that using an mRNA (Pfizer or Moderna) vaccine for dose two after AstraZeneca is equivalent or better, we will offer you a dose two", Reimer said. This will be followed by people aged 70 and over, who can begin booking their second doses the week of June 14.

Starting on Monday, residents 80 years old and up can start booking their appointment for a second dose on the province's booking site for the Pfizer and Moderna vaccine.

"We think about it and talk about it many times every day because we do want to provide the best options for everyone, regardless of what product they got for dose one", she said. For those in public health units who use their own booking system, or who received their doses from the primary care provider or through a pop-up clinic, more information is to come on how and when second dose booking and rebooking will be available.

Some pharmacies in Toronto have received doses of the AstraZeneca COVID-19 vaccine after an earlier delay due to quality control issues, Ontario's Ministry of Health said Thursday. Provincial health officer Dr. Bonnie Henry says there are enough confirmed deliveries of Pfizer and Moderna that the province is able to move up the interval.

Individuals who received a first dose of AstraZeneca will see second dose intervals accelerate to a 12-week interval.

Other reports by Click Lancashire

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