Virus evolution differs by species of mosquito carrier

A new study on how the West Nile virus evolves in four species of mosquitos shows that viruses accumulate mutations in their insect carriers that reduce how well they reproduce when passed on to a bird host. Viruses carried by one of the tropical species were best able to maintain their reproductive fitness and thus spread. The study could help in the prediction of future viral outbreaks.

from Fitness News — ScienceDaily
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