Yellow fever

Yellow fever

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Aedes Aegypti: Yellow Fever Transmitter

What is - definition

Yellow fever is a disease that causes thousands of victims in Brazil. It is caused by a virus, which is transmitted to men by the female mosquito "Aedes Aegypti".

Most affected areas

This disease is present mainly in tropical and subtropical areas, due to favorable climate conditions for the development of this type of insect. The Amazon region, for example, is an important place of development of the disease, because the hot climate, rainfall (high rainfall) and the large number of rivers facilitate the reproduction of this mosquito and the spread of the disease.

After being bitten by the mosquito, the infected person begins to have a number of symptoms: high fever (up to 40 degrees centigrade), severe headaches, vomiting, liver problems and bleeding (bleeding).

Name of the disease

The name of this disease is related to the color that the person's skin becomes after getting the disease. The patient gets jaundice as bilirubin spills into various tissues of the body. When it spreads through the bloodstream, the person has a yellowish color on the skin and also on the eyes.


This infectious disease may remain in the body of the sick individual for approximately two weeks. In some cases, the patient may die due to the aggravation of the disease and damage caused by the virus to the body and organs.


The yellow fever vaccine was discovered at the beginning of the twentieth century by the Brazilian doctor and sanitarist Osvaldo Cruz. Doctors recommend taking this vaccine before traveling to the northern and midwestern regions of the country (places where the risk of contracting the disease is greatest).


- After the sting by Aedes Aegypti, the virus incubation period is three to seven days.

IMPORTANT: The information on this page is only a source for research and school work. Therefore, they should not be used for medical advice. To do so, see a doctor for guidance and proper treatment.