Yellow fever
![Yellow fever virus particles, TEM. © Science Photo Library](https://www.ecdc.europa.eu/sites/default/files/styles/is_large/public/images/Yellow-fever_C.jpg?itok=TXQ_ueCT)
Yellow fever (YF) is an African mosquito-borne infection which can cause a wide spectrum of symptoms, from mild to fatal. In severe cases there may be spontaneous haemorrhage. Mortality of these clinical cases can be as high as 80%, on a par with Ebola, Marburg and other haemorrhagic viral infections.