Ebola is a disease caused by an ebolavirus. Symptoms start two days to three weeks after contracting the virus, with a fever, sore throat, muscle pain and headaches. Vomiting, diarrhea and rash follow, along with decreased function of the liver and kidneys. Victims bleed both within the body and externally. From 1976 through 2013, the World Health Organization reported a total of 1,716 cases. In 2013 an outbreak started in Guinea, spreading to neighboring African countries and infectied doctors, some of who were transported back to the US for treatment. The virus continues to claim victims as it spreads to more countries.