Dengue fever outbreaks in the US leave scientists looking for answers

Aedes aegypti, a mosquito species known for spreading dengue fever, feeds on a human (Image: James Gatheny).

Dengue fever was eradicated from the US nearly 70 years ago, but the devastating tropical disease has made something of a comeback in recent years, following outbreaks in Florida, Hawaii, and Texas. Unlike dengue outbreaks in other parts of the world, its American resurgence has so far been limited in reach — though researchers are still struggling to explain why it hasn’t spread further.

The mystery grew more complex today at the annual meeting of the American Society of Tropical Medicine and Hygiene, where scientists from the National Center for Atmospheric Research (NCAR) presented preliminary findings of a study comparing…

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