Department Of Public Health Announces First Human Case Of West Nile Virus In Southern Illinois
SPRINGFIELD – The Center for Disease Control and Prevention (CDC) has confirmed Illinois’ first human case of West Nile virus (WNV) of 2025 in an individual from Southern Illinois who was hospitalized due to complications of the infection. About one in 150 people who contract the disease caused by a bite from an infected mosquito develop a severe illness that can affect the brain, spinal cord, nerves and even cause paralysis. The case marks the earliest onset of illness observed in Illinois since 2016, and underscores the risk posed by mosquito bites, especially to those who are over 65 or immunocompromised. So far in 2025, WNV has been confirmed in 19 counties. The first WNV-positive mosquito batch of this year was found May 9 in Rockford. In 2024, there were 69 confirmed human cases of WNV including 13 deaths, the highest number since 17 WNV-related human deaths recorded in 2018. “The fact that we are seeing the first human case of West Nile virus so early
stLouIST