That's exactly what I was going to say @ZeddyThaMaster. Of course, cancer and AIDS are horrible, but they aren't as easily spread as Ebola. That's why everyone is losing their minds when Ebola is brought to the United States.
Cancer isnt contagious but you dont have to do anything special to get cancer either. There is a special cancer for just about every organ in the human body and in sone cases, you dont have to do anything to develop cancer. I mean how do kids get cancer? It just happens.