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Yellow fever

Outbreak of yellow fever in Brazil, 2017: Epidemiological situation

As of 2 February 2017, 826 cases (including 155 confirmed) have been reported in Brazil. This represents an increase of 315 cases (including 67 confirmed) since the last CDTR. The most-affected state remains Minas Gerais, with 740 cases (including 138 confirmed) reported.

The World Health Organization (WHO) issued “Temporary yellow fever vaccination recommendations for international travellers related to current situation in Brazil” on 31 January 2017.




Retrieving Data

 Yellow fever distribution in Brazil 2017



Yellow fever is a viral infection that is present in some tropical areas of Africa and the central area of South America, where it has caused large outbreaks in the past.
The virus is transmitted by mosquitoes which also act as an important reservoir. Monkeys and humans also act as reservoirs in the jungle yellow fever and the urban yellow fever cycles.
Following the insect bite, most infections remain without symptoms.
In clinical cases, symptomatic infection appears after an incubation period of 3–6 days. First symptoms are high fever and red eyes, then after a quiet period, a second rise in temperature, accompanied by signs of liver and kidney failure and bleedings (primarily intestinal).
Up to 50% of cases with liver damage may die.
No specific therapy is available.
A highly effective vaccine is available, providing immunity to 95% of vaccinated persons that should be recommended to travellers to endemic areas.


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