Ebola Virus Image (IMAGE) Boston University Caption This is the Ebola virus. Symptoms like fever and fatigue appear anywhere from 2 to 21 days after exposure to the virus; the average is 8 to 10 days. The 2014-2016 Ebola epidemic killed 11,000 people. Credit NIAID: The National Institute of Allergy and Infectious Diseases Usage Restrictions Please credit: 'Photo courtesy of NIAID: The National Institute of Allergy and Infectious Diseases' License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.