Yellow Fever

Yellow fever is caused by a virus that is spread by the Aedes aegypti mosquito. These mosquitoes thrive in and near human habitations where they breed in even the cleanest water.

It is endemic in 34 countries in the sub-Saharan African region, despite the existence of a vaccine for the disease. There are three transmission ‘cycles’ for the disease in Africa - Urban, zoonotic and intermediate.

The urban cycle mediated by Aedes aegypti mosquitoes is responsible for explosive outbreaks. According to a new study, the disease is projected to shift to Central and East Africa from West Africa by 2050. The study also highlighted that vaccination is the most important and effective measure against yellow fever.

Source: PIB

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