Overview

• Massachusetts confirmed its first animal West Nile virus infection this season in a goat in Lunenburg, prompting moderate-risk designations for several Worcester County towns
• State officials have identified ten positive mosquito pools in Massachusetts so far in 2025, though no human cases have emerged yet
• A Lake County resident in their 70s fell ill in early July and was diagnosed with neuroinvasive West Nile virus, marking Illinois’s second human case this year
• Nine out of 214 mosquito batches tested positive for the virus in Lake County, with the first positive sample collected June 24 in Highland Park
• Public health agencies are urging older adults to use EPA-registered repellents, eliminate standing water, and limit outdoor exposure during peak mosquito hours