A growing Ebola outbreak in Central Africa could surpass 20,000 cases within months if efforts to isolate infected people fail, according to new U.S. health projections. Experts warn the spread of a rare virus strain and ongoing conflict could fuel a major health crisis.

Despite the rapid spread, the risk to the U.S. remains low for now, agency says

Experts said they hope the CDC report will help galvanize the response to the crisis.