It is the biggest single-day spike in the province since the outbreak began.
Health officials say of the 145, five are resolved.
The transmission source of nearly all of the new cases is listed as “pending,” though one is reported as being travel-related with a woman in Niagara Region who has a travel history to Egypt.
The Ministry of Health told Global News that the province still has no confirmed instances of community spread, though “pending” indicates that health officials are still gathering information.
The majority of the new cases are listed as being in southern Ontario, with 14 in Toronto, five in Peel Region, three in York Region, three in Hamilton, two in Durham, two in Waterloo, and one in Niagara.
One was also the first case reported in Peterborough, related to travel in Spain and Portugal. Two cases were from Grey Bruce, related to cruise travel.
Five cases were also reported in Ottawa, two in Simcoe-Muskoka, and one in the Kawartha area. The location for one of the individuals is listed as “pending.”
All but one of the new cases are listed as being in self-isolation, with a person in Simcoe-Muskoka in hospital.
Health officials also report 1,316 cases are currently under investigation, while 7,004 came back with a negative result.
Concerned about COVID-19? Here are some things you need to know:
Health officials say the risk for Canadians is low.
Symptoms can include fever, cough and difficulty breathing – very similar to a cold or flu. Some people can develop a more severe illness. People most at risk of this include older adults and people with severe chronic medical conditions like heart, lung or kidney disease.
To prevent the virus from spreading, experts recommend frequent handwashing and coughing into your sleeve. And if you get sick, stay at home.
For full COVID-19 coverage from Global News, click here.