Symptoms of the viral disease vary from person to person.
It's not uncommon to find West Nile virus in mosquitoes found in Peel Region.
Last year, Toronto Public Health did not record the first lab-confirmed case of West Nile virus until August 25.
"Mosquito-borne diseases overall are increasing", CDC spokeswoman Kate Fowley told weather.com.
Three mosquito pools have tested positive for the West Nile Virus, the Portsmouth City Health Department reports. Rarely, transmission to humans has occurred via exposure in a laboratory setting, through a blood transfusion or organ donation or from mother to baby during pregnancy, delivery or breastfeeding.
"Mosquitoes are weak flyers and won't travel far from where they are born - if there are mosquitoes in your backyard or neighborhood, they are likely laying eggs there as well", said Matt Helwig, a biolgist with the DEP mosquito program. Fairfax County health officials said they had five reports of people contracting West Nile virus previous year but none in 2016.
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Human and non-human cases of West Nile Virus by state.
In Maryland, there were five reported cases of West Nile past year, according to the Centers for Disease Control and Prevention.
Symptoms include fever, headache and body aches.
"While mosquito numbers are low in most communities, surveillance shows the numbers of infected Culex tarsalis continue to increase throughout southern Manitoba", a release from the province said. Of those, 23 cases involved meningitis or encephalitis.
You should also take steps to reduce standing water where mosquitoes breed.
Be sure to check screens for holes and run the air conditioner when you can.