Trudeau said the federal government, in talks with the provinces, is considering tougher surveillance measures for new worldwide travellers in the coming months, especially if Canada's border restrictions are eased and more travellers are allowed into the country.
Applications for the program can be made starting on May 25 when the portal opens.
"With many people discovering we can work from home to a much greater degree, there may be a lot of vacancies in commercial buildings in the coming months and years", Trudeau said.
The Rent Assistance program was initially announced in April as a rent relief program to help businesses who are struggling to pay their landlords due to the COVID-19 pandemic.
Landlords would cover 25% with tenants paying the rest with help from other support programs provided by governments.
"We will continue to watch carefully what's happening elsewhere in the world and around us as we make decisions on the next steps", he said.
Information on the application process is available on the Canada Development Investment Corporation (CDEV) website.
"If you're a landlord, and you and your tenant are eligible, please apply", Trudeau urged. He also said payments to landlords should arrive on time for June 1.
The budget for federal aid has hit $151.7 billion, with tens of billions more in loans to put a floor under the economy to help in a rebound.
Meanwhile, a federal wage subsidy program has now approved 215,661 claims for help, providing $5.7 billion in aid to companies to cover 75 percent of wages for nearly 2.8 million workers.
She said Public Health will be posting the updated recommendations on medical masks online today, noting that the recommendation isn't mandatory and will allow for public health officers across Canada to consider their area's needs.
Trudeau made it clear these are not bailouts for businesses.
Publicly traded companies, or any their private subsidiaries, will have to issue warrants giving the government the option of purchasing shares worth 15 percent of the loan, or receiving the equivalent in cash. Privately held companies will pay the same in fees.
The terms of the program are created to ensure "that if the firm does well, that Canadians, and Canadian taxpayers, share in that upside", Morneau said in unveiling the details.
The program will have limits on dividends, share buy-backs and executive pay, and the government said it will be reviewing companies' global organizational structure when determining eligibility.
Loans would start at $60 million with no upper limit, Morneau says, and be targeted at firms with earnings of at least $300 million. "To keep two metres apart, to stay at home wherever possible, to wash your hands regularly and frequently", he said.
"We're going to need to hire tens of thousands of contact tracers to make sure we know who has been exposed to an infected individual", said Seth Harris, former acting USA secretary of labor under the Obama administration.