As Ann Coulter points out in her recent piece.
http://www.anncoulter.com/columns/2014-10-15.html
“At the moment, more than 13,000 West Africans have travel visas to come to the U.S. Having just seen an Ebola-infected Liberian get $500,000 worth of free medical treatment in the U.S., the first thing any African who might have Ebola should do is get himself to America.
Of all the reasons people have for coming here — welfare, drug-dealing, Medicare scams — “I have Ebola and I’m going to die, otherwise” is surely one of the strongest. The entire continent of Africa now knows that this is a country that will happily spend half a million dollars on treating someone who just arrived — and then berate itself for not doing enough.”