Mosquitoes carrying deadly diseases are spreadng across the US

West Nile virus, Eastern equine encephalitis (EEE), malaria and dengue are gaining new ground in the US. The mosquitoes that carry these diseases are thriving in a warming world.

Once rarely seen outside of East Africa and parts of the Middle East, West Nile virus is establishing an increasing hold in New York and more broadly across the US. In 2023, the virus was detected in more than 1,100 mosquito pools, mostly in Queens. To date in 2024, cases of West Nile fever have been detected in 39 states. An estimated 70-80% of West Nile infections are very slight or entirely asymptomatic, but severe infections can lead to permanent neurological complications.

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