Viral Infection
Dengue is ranked by the World Health Organization (WHO) as the most important and fastest growing mosquito-borne viral disease in the world today, causing nearly 500 million infections every year. In the last five decades, dengue has spread from being present in a handful of countries to being endemic in 128 countries, where about 4 billion people live. (http://bit.ly/2DDkYkD, http://bit.ly/2zQpQyp)