Climate change is likely the culprit for mosquitoes arriving earlier, as warming temperatures were seen to impact diseases transmitted by mosquitoes in other places.
As climate change pushes temperatures higher, the viruses carried by the unofficial state bird are likely to proliferate faster, increasing its threat of infecting human beings with West Nile, Zika and dengue.
Mosquito-borne diseases like Zika and West Nile lack vaccines. But Washington scientists think insulin could weaken these diseases in mosquitoes before they reach people.
