The numbers behind the administration’s decision on Ebola
The Washington Post - 10/23/2014
At the request of Wonkbook, a group of researchers based at Northeastern University led by Alessandro Vespignani modeled the effects of reducing air traffic by 95 percent between the three countries and the rest of the world. (Traffic has already declined by about 80 percent, they estimate.) The result was that the next case would arrive in the United States about a month later — on average, sometime in the middle of December instead of the middle of next month.