Yellow fever is a mosquito-borne viral disease that occurs in tropical and subtropical areas of Africa and South America only. Althought there is, at present, no cure for the fever there is a successful vaccine. There has been a marked resurgence of yellow fever in areas of Central and South America and Africa since the 1980s.

Malaria is a mosquito-borne disease. People with malaria often experience fever, chills, and flu-like illness. Left untreated, they may develop severe complications and die. Each year between 350-500 million cases of malaria occur worldwide, causing 2 million fatalities.