Two people have died of West Nile virus in Sacramento and Shasta counties, the first reported deaths in the state this year. Last year, 15 people died in California from the virus, which is usually transmitted to humans from a bite by an infected mosquito. One variety of mosquito found recently in San Mateo, Madera and Clovis is particularly worrisome because it can carry a number of deadly diseases, including yellow fever and West Nile. The state's entomologists are mobilizing to fight this new, bloodsucking threat.
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