Mosquitoes under a microscope at the Sacramento-Yolo Mosquito and Vector Control District.
It's mosquito season, and that means that West Nile virus is back. The Midwest outbreak this summer is the worst in U.S. history, with 50 deaths so far in Texas alone. Fewer people have gotten sick in California, but the disease showed up here earlier than usual. And scientists are concerned that as the climate warms, West Nile and other mosquito-borne illnesses will gain a stronger foothold here. Reporter: Molly Samuel
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