The low-down on yellow fever

​​​​​​​Travellers to Africa and South America need to know the latest yellow fever inoculation information

Yellow fever is caused by an RNA flavivirus transmitted by mosquitoes. Although the mosquito vector that transmits the disease (Aedes aegypti) is present in many parts of the world, yellow fever currently occurs in parts of sub-Saharan Africa and parts of South America.

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Clinical features vary from a non-specific febrile illness to a fatal haemorrhagic fever. Prevention of yellow fever involves mosquito avoidance and vaccination.

Vaccination is recommended for travellers to countries or areas with risk of yellow fever transmission; some countries also require proof of

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