Yellow Fever 

Yellow fever is a viral haemorrhagic disease. 
 
It is transmitted by infected mosquitoes. The ‘yellow’ in the name refers to the jaundice that effects some patients. There is no treatment for the disease and vaccination is the most effective method of prevention. 
 
Up to 50 percent of severely affected patients die within 14 days, according to the World Health Organisation. 
 
The vast majority of yellow fever cases and deaths take place in sub-Saharan Africa, where the disease is a major public health problem. 
 
Thirty-two African countries are now considered at risk of yellow fever, with a total population of 610 million people