Mosquito population is growing, West Nile virus is spreading. Why?

CHICAGO (NewsNation) — Mosquito season has come earlier than expected this year, and the little insects — testing positive for West Nile virus and Eastern equine encephalitis virus — are already plaguing much of the U.S.

“I can confidently say that this has been one of the worst mosquito seasons so far on record," Brendan Earl, a supervising sanitarian in West Michigan, told WXMI.

After preliminary testing, multiple states have detected mosquitoes infected with WNV and EEE, according to multiple reports.

Officials in Massachusetts have urged residents to seek protective measures against mosquitos after the bugs tested positive for WNV and EEE.

Other states that have seen recent WN...