Canadian Prime Minister Justin Trudeau said Monday he will close the country's borders to anyone not a citizen, an American or a permanent resident and asked all Canadians to say home amid the coronavirus pandemic.
Exceptions include air crews, diplomats, immediate family, and US citizens.
Trudeau, who said he has displayed no symptoms so far, does have help with logistics.
There will also be new travel restrictions, with only four airports - Toronto, Montreal, Calgary, and Vancouver - accepting global flights. Domestic flights, as well as flights coming from the U.S., Mexico, the Carribean and Saint Pierre and Miquelon will not be affected.
Ottawa is urging Canadians not to travel outside the country and says citizens who are overseas should return home via commercial means. Once you arrive back to Canada you are asked to self-quarantine for 14 days.
Canada had at least 324 confirmed cases of Covid-19 across all 10 provinces as of Monday morning.
Airport operators will be required to conduct basic health assessments for all travellers.
Trudeau, however, couldn't explain why USA citizens are still being allowed to enter Canada, even though, as of Monday, there were 4,165 COVID-19 cases and 72 deaths in that country.
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Earlier, Mr Trump confirmed he had taken a coronavirus test but that his temperature was "totally normal". Graham said he was in contact with an Australian official who later tested positive for coronavirus.
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Another health care worker has also tested positive for the virus, a woman in her 40s who lives in the Fraser Health Region. Foreign Affairs Minister Francois-Philippe Champagne said Canada made the decision after the USA government asked for help.
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The virus has spread to over 100 countries with more than 110,000 cases of infection. Trump says he is hoping to bring in help for hourly wage earners.
Officials in the Pacific Coast province of British Columbia also announced three more deaths, all of them stemming from a long-term care home in North Vancouver where the first death in Canada was reported.
Throughout the day provincial governments and health authorities have been providing updates on the number of cases in their provinces, with some premiers calling for more action from the federal government, including tightening up the borders.
He also called on Trudeau to seal off the country.
Trudeau remained in self-isolation because his wife, Sophie Gregoire Trudeau, tested positive for COVID-19 last week and is recovering. "We all need to act now".
These travel restrictions will not apply to commerce or trade so as to "continue to ensure the supply of important goods to Canada", Trudeau said.
"We have not seen an urgent enough escalation in testing, isolation and contact tracing, which is the backbone of the response" to determine who is sick, he added.
What more did Canada announce on Monday?
Trudeau said there are no plans to enforce social distancing rules at this time, but Canadians are strongly urged to stay home as often a possible and avoid large crowds.