Dozens of ZIP codes in south Nevada, together with Las Vegas, are being overrun by mosquitoes carrying West Nile virus, in what NBC Information says are record-busting numbers. Well being officers say that, in current weeks, 24,000 swimming pools of mosquitoes have been examined for the contagious illness in 25 ZIP codes within the southern a part of the state. Almost 170 of these swimming pools examined optimistic for West Nile, and each the variety of mosquitoes logged and the variety of positively testing swimming pools so early within the season broke data set in 2019. Clark County: Final yr, from April to June, 6,000 mosquitoes have been cornered in traps within the Nevada county the place Vegas is seated. To this point this yr, that quantity has already soared to greater than 24,000.