The Ebola outbreak in the Democratic Republic of the Congo and Uganda could lead to more than 20,000 cases and over 2,000 deaths in a worst-case scenario, according to a report published Friday by the Centers for Disease Control and Prevention. That scenario — modeled using data through May 24, when about 50 deaths had been reported — assumes that only 20% of Ebola patients isolate and that access to vaccines and treatments is limited, the agency said. The outbreak is caused by a rare type of