First West Nile Virus-Positive Mosquitoes Reported In Chicago This Year
Block Club Chicago • • health
Key Points:
- West Nile virus-positive mosquitoes have been detected in Chicago for the first time this year, though no human cases have been reported so far, according to the Chicago Department of Public Health.
- The virus is primarily transmitted through mosquito bites, with the highest risk occurring from June to October during peak mosquito season.
- Most infected individuals show no symptoms, but about 20% develop flu-like symptoms, and severe illness can occur, especially in people over 55 or with weakened immune systems.
- There are no vaccines or specific treatments for West Nile virus, so prevention focuses on avoiding mosquito bites through repellents, protective clothing, and eliminating standing water.
- Chicago’s health department actively combats the virus by treating storm drains with larvicide, testing mosquitoes weekly, spraying adult mosquitoes, and monitoring human infections.