They are life-threatening to Canadians and to the rest of the world. Canada takes in over 200,000 immigrants a year. Another 25,000 people sneak into Canada illegally and make refugee claims. Many of these take years to resolve. There are few consequences for not doing so.
Diseases formerly eradicated in the West are back with a vengeance.
It was suspected that she had Ebola fever. Most victims die from shock after days of high fever, vomiting and massive bleeding out. The worst of the viral hemorrhagic fevers have been ruled out, but her ailment remains a mystery. Seventy people are being closely monitored, including five who were splashed with body fluids. Although she was asymptomatic on her various flights, it is disturbing to note that the Port Authority of New York and New Jersey, which runs the Newark airport, was not even notified that a possibly infected passenger had traveled through the airport.