Dengue fever is an illness you can get from the bite of a mosquito
carrying one of four types of dengue virus (DENV). The virus is most
commonly found in tropical and subtropical regions, including Central
and South America, Africa, parts of Asia and the Pacific Islands.
Dengue isn’t contagious from person to person except when passed from
a pregnant person to their child. Symptoms are usually mild with your
first infection, but if you get another infection with a different
version of DENV, your risk of severe complications goes up.