I will give you an example. A family of eight people arrived from Haiti. When they landed in Toronto, they were given visitor visas. When they got on the plane in the Dominican Republic, they were told that at the port of entry they would be given temporary resident visas, which would allow them to do things, to live in the country. With a visitor visa, those people have all the problems in the world.
I will use the term in its narrowest sense. One of those people was a 15-month-old baby born in New York. Those people were in Haiti before arriving here. They were all given a health insurance card, except for the baby. Imagine the situation: a mother who has a 15-month-old baby can go to the doctor, but if her child is sick, she has a Hobson's choice. She can't take her child to the hospital; they won't take the child because she has no money to pay. Otherwise, if she crosses the border with her child, she can't come back, because she has a visa for only one entry.