Sir Richard said it was absolutely important Australians were vaccinated as soon as possible so life could return to normal.
The situation appeared more hopeful in Ontario and Quebec, where cases have been slowly declining from third-wave highs.
Clinics for youth are still planned for the weeks of June 14 and 21. He explained that for a limited time during the week of May 24, people who received their first dose of AstraZeneca during the period of March 10 to March 19 may opt for their second dose.
"I think we've all regretted things we've said".More news: Pfizer and AstraZeneca 'highly effective' against India Covid variant
The province is seeking advice from the National Advisory Committee on Immunization (NACI) to determine if it can provide a second dose of the Pfizer or Moderna vaccine, but has yet to get that green light.
Johnson & Johnson unveiled a deal with the Covax vaccine-sharing programme for 200m doses this year, and said it was discussing the "potential supply" of an additional 300m for next year.
Dr. Dirk Huyer, the coordinator of provincial outbreak response, said in a press conference Friday that those who received the AstraZeneca shot made the right decision.
"China supports its vaccine companies in transferring technologies to other developing countries and carrying out joint production with them", he added. "If we look across the seas and see how the U.K.is doing, it's tremendously beneficial".
Pharmacies across Ontario are ready to administer the second shot of the Oxford-AstraZeneca vaccine before 55,000 doses expire on May 31.More news: Reopening Ontario isn’t just on Doug Ford - it’s down to us
Ontario reported just under 1,700 new cases, while Quebec fell below the 500 mark for the first time since last September.
The Pfizer-BioNTech vaccine is now the only COVID-19 vaccine approved for those 12 and older.
So, if a person's first dose was an mRNA vaccine, their second dose should also be an mRNA vaccine.
As of Saturday afternoon, Canada reported 3,647 new cases of the COVID-19, bringing the cumulative total to 1,355,765 cases, including 25,203 deaths, according to CTV.
Dr. Liam Yore, past president of the Washington State chapter of the American College of Emergency Physicians, said in an interview that he recently had seen a teenager with myocarditis after vaccination.More news: Alexandria Ocasio-Cortez raises security concerns after Marjorie Taylor Greene confrontation