10 Deadliest Viruses In Human History

7. Dengue Fever

Dengue viruses are hosted in species of female Aedes mosquitos

Dengue viruses are hosted in species of female Aedes mosquitos. This makes dengue fever a mosquito-borne tropical disease since mosquitos only survive in tropical regions. Its symptoms include high fever, joints, and muscle pains, headache, vomiting and skin rash. It mainly affects children under 15 years of age.

There are 5 types of dengue virus which cause 5 types of dengue fever diseases. When infected, you can take less than a week to fully recover and become immune to the particular type of virus you suffered from. Infection with one type only offers a short-term immunity to the other types of dengue viruses. If not treated, the disease may develop into severe (dengue hemorrhagic fever), that causes bleeding, blood plasma leakage and very low blood pressure that could lead to dengue shock.

The first outbreak of dengue fever was recorded in 1779 and 1780 occurring in Asia, Africa, and North America. Lately, the fever has been common in countries in Southeast Asia and western pacific island regions, South America and the Caribbean. An estimated 390 million dengue infections occur each year resulting in about 25,000 deaths annually. In 2019 a vaccine for dengue fever was approved and is now commercially available.