Yellow Fever

Nature had found the perfect place to hide the yellow fever virus. It seeded itself and grew in the blood, blooming yellow and running red - Molly Caldwell Crosby

Yellow Fever
Yellow Fever

image by: Arjay Magpantay

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 The Fight Against Yellow Fever Must Go On

Unlike other diseases afflicting tropical regions like malaria, HIV, Ebola and others, we thankfully have had an effective vaccine against yellow fever since the 1930s. This vaccine is the best way to prevent yellow fever and keep people safe from its deadly symptoms, possibly for life. The problem is that our supply of the vaccine is in jeopardy.

Yellow Fever Casebook

Descriptions of historic yellow fever cases, especially in Philadelphia and New York in the 1790s.

Yellow fever is a serious disease, which occurs in tropical Africa and Latin America. 900 million persons live in areas at risk of this disease. There is no cure for Yellow Fever, and up to 50% of severely affected persons without treatment will die.


Yellow fever killed about 10% of Philadelphia’s population in 1793, when it was the capital and largest city in the United States. Local and federal government officials fled, including President George Washington. More


Yellow fever virus is found in tropical and subtropical areas in South America and Africa. The virus is transmitted to people by the bite of an infected mosquito. Yellow fever is a very rare cause of illness in U.S. travelers. Illness ranges in severity from a self-limited febrile illness to severe liver disease with bleeding. Yellow fever disease is diagnosed based on symptoms, physical findings, laboratory testing, and travel history, including the possibility of exposure to infected mosquitoes.

Department of Health - Australia

If you are travelling to Africa, the Caribbean, Central or South America, you should be aware of the risk of yellow fever virus transmission and take the necessary precautions to protect yourself from infection.


There's no specific treatment for yellow fever. But getting a yellow fever vaccine before traveling to an area in which the virus is known to exist can protect you from the disease.


The symptoms of yellow fever include fever, headache, and muscle aches, with some patients going on to develop life-threatening complications.


Yellow fever is a serious viral infection that's spread by certain types of mosquito. It’s mainly found in sub-Saharan Africa, South America and parts of the Caribbean. The condition can be prevented with a vaccination and is a very rare cause of illness in travellers.


Yellow fever is a viral illness transmitted between primates by several species of mosquito. It is not transmitted directly from person to person. The pathogen is an RNA virus belonging to the genus flavivirus and it affects only primates (including humans) and certain mosquito species of which the main vector is the yellow fever mosquito (Aedes aegyptii).

Public Health Agency of Canada

Immunisation is required legally for travelers visiting areas of endemicity or traveling from areas of endemicity into counties that are free of YF.


The number of yellow fever cases has increased over the past two decades due to declining population immunity to infection, deforestation, urbanization, population movements and climate change. There is no specific treatment for yellow fever. Treatment is symptomatic, aimed at reducing the symptoms for the comfort of the patient. Vaccination is the most important preventive measure against yellow fever.

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