Drone strikes aren't contagious either. (Come to think of it, is the original quote actually true? One U.S. citizen notably died of Ebola in the U.S. How have those working with Ebola victims in Africa fared?)

The point being, that the original quote and this one are nonsensical comparisons. The only way for people in the U.S. (whether they are citizens or not) to be safe from Ebola is for people with Ebola to be prevented from entering; if found to have entered, to be isolated; if found to have been contagious before isolation, for their contacts to be found. I gather from the news that this is, more or less, being done, in spite of people protesting, in effect, "we are safe, therefore precautions are unnecessary".

But when the people are safe, they do not see the use of the things that keep them safe.