Two new human cases of West Nile have been reported in Contra Costa County, health officials announced Friday.
According to the Contra Costa Mosquito & Vector Control District, the two new cases were in the eastern portion of the county and likely had been infected in late September.
The District also reported a dead bird from Alamo has tested positive for the virus. The bird was found near Golden Grass Drive and Stone Valley Road.
"This year we have received five reports of people who have tested positive for West Nile virus,” said Deborah Bass, spokeswoman for the District. “Through patient interviews, it is likely only two were infected locally. The other three people were determined to have been infected outside of Contra Costa County."
Bass said it was important to remember that the majority of West Nile virus cases are not reported. In fact, based on data from the CDC, we estimate that in Contra Costa County up to 280 people were affected by the virus last year, they just didn't know it or it wasn't reported.
West Nile virus symptoms of the mild form include fever, headache, tiredness, body aches, and swollen lymph glands. While the illness can last only a few days, even healthy people have reported being sick for several weeks. West Nile virus of the severe form can be fatal.
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