This document from the Pentagon's Emergency Management office provides information about Ebola virus disease (EVD) including how it spreads, symptoms, and prevention. It notes that the first US case was diagnosed in September 2014 and that proper hygiene like handwashing is key to prevention since EVD can survive on surfaces for hours and in body fluids for days. Symptoms may appear 2-21 days after exposure and include fever, headache, muscle pain, diarrhea and bleeding. The risk of infection is low unless one comes into direct contact with an infected person's bodily fluids.