Amidou and Pape were born in America, but had been in Senegal learning French, said their dad, a 62-year-old cab driver. Since moving here about a month ago, the boys' experience at the Tremont school has been infected with fear. "They go to gym, and they say, 'You don't touch the ball, you have Ebola, if you touch it we will all get Ebola,' " their father explained.