Sep. 17--Two California men have died after getting the West Nile virus -- the first deaths this year attributed to the mosquito-borne disease, state health officials said Thursday.
Despite the low number of human infections this year, state officials urged people to take precautions. The virus is most commonly transmitted by mosquito bites.
"The greatest reason for the decreased activity in 2009 is the relatively cool summer compared to previous years," Dr. Gilberto Chavez of the California Department of Public Health. The cooler summer and a dry winter -- as well as increased control on the mosquito population -- are credited for the decline in infections.
So far this year, there have only been 36 reported West Nile virus cases in humans. Last year, there were 445 human cases -- with 15 deaths.
The lower infection numbers in California mirrors national trends, according to statistics from the Centers for Disease Control and Protection.
So far this year, there have been 10 West Nile deaths across the country, with 280 infections reported.
In 2008, there were 1,356 infections and 44 human fatalities, the CDC reported.
Human cases traditionally diminish in fall, as cooler temperatures arrive and mosquito populations recede.
Still, California health officials continue to urge people to apply insect repellent and cover up, particularly during dawn and dusk when mosquitoes are most active.
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