Yellow Fever

What is Yellow Fever?
Yellow fever is a zoonotic disease caused by an arbo–virus.  It shares its clinical features with other viral hemorrhagic fevers (e.g. Dengue Hemorrhagic Fever, Lassa fever etc). Severe cases develop jaundice with hemorrhagic manifestations (Black vomit, Epistaxis, Melena) and albuminuria or anuria, shock, agitation, stupor and coma. In general, death occurs between the fifth and tenth day of illness.

How is Yellow Fever transmitted?
It affects principally, monkeys and other vertebrates in tropical America and Africa, and is transmitted to man by certain culicine mosquitoes. Currently, yellow fever transmission occurs almost exclusively in areas of sub-Saharan Africa and South America.

Why should I take the Yellow Fever vaccination?
The case fatality rate may reach 80% in severe cases. Persons aged 9 months and above who are travelling to or living in areas of South America and Africa where yellow fever infection is officially reported should be vaccinated. It is a requirement under the International Health Regulation (WHO) for persons travelling to endemic areas/countries.

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