For the first time in two days, the number of new COVID-19 cases in the province is less than 400.
Ontario reported 365 new cases on Sunday, down from 407 the previous day, on Friday.
There were 113 new cases in Toronto, 108 in Peel and 38 in York. Ottawa reported 14 new cases.
The Simcoe Muskoka District Health Unit reported two new cases on Sunday, compared to 11 the previous 24 hours.
People under the age of 40 make up 69 per cent of the new infections in Ontario.
A health care worker is the latest death from COVID-19. Public Health Ontario did not provide more details.
There were more than 40,000 tests completed, which is a new provincial record.
There are 3,054 active cases of the virus in Ontario, compared to under 900 in late July.
The latest death from COVID-19 pushes the number of fatalities to 2,825 since March.