West Nile Virus is spread to people through the bite of infected mosquitoes.
There is new evidence of West Nile virus in Perth County.
In the third week of July, 28 mosquito samples tested positive for West Nile - 12 more cases than the average 16 typically reported at that time for the past 12 years, according to the governor's office.
Most people infected with the virus have no symptoms at all, or they have flu-like symptoms such as fever, headache, body aches and fatigue.
Between 70 percent and 80 percent of people that become infected with West Nile Virus do not develop any symptoms.
Throughout the summer months, public health traps and tests mosquito pools across Oxford County on a weekly basis.
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"Controlling an epidemic of WNV infection is a community effort that calls upon residents to take preventative measures to reduce exposure", Ganesh Shivaramaiyer, DCHHS' interim director, said.
Use effective insect repellent such as DEET or Picaridin.
Dusk and dawn are when mosquitoes are most active.
The state only had four cases until then, but reported 14 positive cases last week.
Since 2000, 134 cases of the virus have been diagnosed in CT residents and three people have died after being infected with the virus.