The virus that causes eastern equine encephalitis, or EEE, has evolved to infect mosquitoes. To be able to spread between people, however, it faces extra challenges.

“If the temperature isn’t right, mosquitoes can’t complete their life cycle. Similarly ... or parasites,” Standlee explained. “And the males of the species are pollinators, while ...

The dengue virus is transmitted to humans via the bite of an infected mosquito. Only a few mosquito species are vectors for the dengue virus. What is a vector? A vector is a vehicle that carries ...

Now, each time the mosquito feeds, it will pump virus-saturated saliva into its new animal host and continue the disease transmission cycle ... which helps explain why human infections don ...