Why Dengue and Yellow Fever Could Be Coming to a City Near You

This past summer, Aedes aegypti—the invasive African mosquito best known for carrying the potentially deadly diseases dengue and yellow fever—made its unexpected debut in California, squirming up from Madera to Clovis to Fresno and the Bay Area.

For a blood-sucking nightmare, Aedes aegypti is surprisingly attractive: Its dark skin and bright white polka-dots make it hard to miss. Unfortunately, it is also notoriously difficult to control. According to the Centers for Disease Control and Prevention, Aedes aegyptican lay its eggs in less than a teaspoon of liquid and survive without water for months.