Welcome to the State of California 

Yellow Fever 

Yellow fever is a serious disease caused by the yellow fever virus. It is spread through the bite of an infected Aedes mosquito and cannot be spread directly from person to person. It is found in certain parts of Africa and South America. The yellow fever vaccine is recommended for people traveling to these regions.

Yellow fever can cause:

  • fever and flu-like illness
  • jaundice (yellow skin or eyes)
  • liver, kidney, respiratory and other organ system failure
  • vomiting blood
  • death

As with other mosquito-borne diseases found in the tropics, travelers should take all steps to reduce their exposure to mosquitoes and prevent mosquito bites. When traveling to countries with yellow fever, use insect repellent, wear long sleeves and pants, and stay in places with air conditioning or with window and door screens. 

For Health Professionals
Yellow Fever Vaccine Program
Last modified on: 9/8/2016 2:52 PM