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“But we are not out of the woods yet, and really that buys us time,” she said.

If the virus can’t be contained and eradicated from human transmission, Henry said it might arise next influenza season, by which time anti-viral medications and a vaccine could be developed.

Screening people at airports is challenging and limited, so countries like Iran, which has an increasing number of COVID-19 cases, should not allow people with symptoms to fly elsewhere, Henry said.

“They’ve (Iran) been putting screening measures in place, I understand, and South Korea has actively been doing that,” she said.

“We do ask everybody that’s coming here to ensure that they monitor carefully for symptoms. We will be stepping up our advice on that.”

Anyone with symptoms should limit their contact with others and contact their primary care provider, local public health office or call the 811 healthline to reduce the possibility of passing the virus on to others, Henry said.

Many more Canadians who were outside of the country have tested positive for the new coronavirus.

They include 129 people who were aboard the Diamond Princess cruise ship, which was docked in Yokohama, Japan, since early February, being repatriated to Cornwall, Ont., on Friday. They will be is isolation for 14 days.

“We are watching very carefully,” Henry said. “Although there is widespread transmission of some areas of the world we are not in that position yet but we are preparing for that, we are preparing for all of the possibilities that we might see over the coming weeks.”

Of the seven cases, the first has fully recovered, Henry said. The other six patients remain in self-isolation at home and under the care of public health teams.

A fourth case of the virus was confirmed in Ontario on Sunday, with the previous three cases cleared of the illness.