Today's up-date:
Ontario reported 4,177 new cases of the virus -- more than two-thirds of which are in people who are fully vaccinated -- in what was the highest daily tally since April 23.
The province's science advisers have said two doses of COVID-19 vaccine are only 35 per cent effective against the variant three months after being administered, while a third dose bumps efficacy up to 75 per cent.