©2018 WebMD, Inc. All rights reserved. eMedicineHealth does not provide medical advice, diagnosis or treatment. See Additional Information.

Symptoms and Signs of Yellow Fever

Doctor's Notes on Yellow Fever

Yellow fever is a viral hemorrhagic infection transmitted by mosquitoes of the Aedes genus. Yellow fever is found in the equatorial tropics.

Early symptoms of yellow fever may be similar to malaria, dengue fever, or other viral hemorrhagic fevers. Symptoms of yellow fever may include sudden high fever, chills, prominent backache and headache, appetite loss, nausea or vomiting, and occasionally a slow heartbeat. About 15% of patients will develop a second, more severe, stage of illness with symptoms including high fever, abdominal pain, nausea and vomiting, and development of jaundice (yellowing of skin and eyes). Other symptoms may include spontaneous bruises and bleeding due to abnormal blood coagulation from the eyes, nose, mouth, needle puncture sites, as well as upper and lower gastrointestinal tract with blood in vomit and stool. Abnormal blood levels of liver enzymes and kidney failure may occur.

Medical Author: John P. Cunha, DO, FACOEP
Medically Reviewed on 3/11/2019


Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.