The incubation period for Ebola is 2 to 21 days. Early symptoms include fever, fatigue, muscle pain, headache, and sore throat. These are followed by vomiting, diarrhea, rash, symptoms of impaired kidney and liver function, and in some cases, both internal and external bleeding (e.g., oozing from the gums, blood in the stools). Laboratory findings often include low white blood cell and platelet counts and elevated liver enzymes.