Here’s why mosquitos are so bad right now — and why you don’t have to worry too much about West Nile virus

“We typically don’t have significant disease concerns with them,” said PJ Liesch, a University of Wisconsin entomologist. “These floodwater mosquitoes can be a nuisance, and they can lead to lots of bites and things like that, but in many cases they aren’t carrying diseases like West Nile virus.”