Reimer said that lower efficacy has been shown when second doses come prior to 12 weeks.
The Japanese government is considering sharing with Taiwan some of its supply of the COVID-19 vaccine developed by Britain's AstraZeneca Plc, Foreign Minister Toshimitsu Motegi said Friday, in a bid to help the self-ruled island struggling to procure shots.
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.
"We are thankful to the Government of France and to other partners for their support in making these vaccines available".
Further second doses will be distributed in a process that broadly mirrors when people received their first doses: people who received their first doses between March 8 and April 18 will become eligible starting the week of June 28, while people who received their first dose between April 19 and May 9 will be eligible starting the week of July 19. Most residents are now waiting about four months between each dose, with some exceptions for those in long-term care, high-risk health-care workers and people with specific health conditions. Appointments at this time will also open to those with highest health-risk conditions and special education workers.
Officials are encouraging residents to book their second appointment using the same channel as the first.
"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.
Advice for those who received the AstraZeneca vaccine as their first dose remained status quo on Wednesday.
The AstraZeneca vaccine has been linked to rare, potentially fatal blood clots, prompting several provinces to recently limit its use as they await further research.
For those who didn't receive AstraZeneca, second doses are available for anyone 80 and older or for those who received their first dose before March 1.
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. It already has an agreement with AstraZeneca to secure enough doses for 60 million people.
This is a breaking news story.