Ebola study by Canadian researchers suggests three travellers with the virus will leave West Africa every month

It's the one thing that no country in the world wants right now: the Ebola virus arriving on its doorstep. Some lawmakers have even proposed shutting borders to travellers from West Africa that have been hit by the virus.  But what are the risks, really?

Well, a group of Canadian researchers have crunched the numbers, trying to predict how many more people infected with Ebola will leave West Africa. 

There have been no cases of Ebola in Canada. One of the study's authors, infectious disease specialist Isaac Bogoch, with Toronto's University Health Network, tells Carol his team's findings suggest that three travellers with the virus will leave West Africa each month. But Dr. Bogoch argues against a travel ban because he says it will further isolate the affected countries. He feels the solution is to pour resources into fighting the Ebola epidemic at its source.

The research has just been published in the Lancet medical journal.